diff --git a/addon-test-support/-private/get-element-with-assert.js b/addon-test-support/-private/get-element-with-assert.js
deleted file mode 100644
index 33f7cdd..0000000
--- a/addon-test-support/-private/get-element-with-assert.js
+++ /dev/null
@@ -1,16 +0,0 @@
-import getElement from './get-element';
-
-/*
-  @method getElementWithAssert
-  @param {String|HTMLElement} selectorOrElement
-  @param {HTMLElement} contextEl to query within, query from its contained DOM
-  @return {Error|HTMLElement} element if found, or raises an error
-  @private
-*/
-export default function getElementWithAssert(selectorOrElement, contextEl) {
-  let el = getElement(selectorOrElement, contextEl);
-  if (el) {
-    return el;
-  }
-  throw new Error(`Element ${selectorOrElement} not found.`);
-}
diff --git a/addon-test-support/-private/get-element-with-assert.ts b/addon-test-support/-private/get-element-with-assert.ts
new file mode 100644
index 0000000..4854ee4
--- /dev/null
+++ b/addon-test-support/-private/get-element-with-assert.ts
@@ -0,0 +1,10 @@
+import getElement from './get-element';
+import { ElementOrSelector } from './types';
+
+export default function getElementWithAssert(selectorOrElement: ElementOrSelector, contextEl: ElementOrSelector) : HTMLElement {
+  let el = getElement(selectorOrElement, contextEl);
+  if (el) {
+    return el;
+  }
+  throw new Error(`Element ${selectorOrElement} not found.`);
+}
diff --git a/addon-test-support/-private/get-element.js b/addon-test-support/-private/get-element.ts
similarity index 55%
rename from addon-test-support/-private/get-element.js
rename to addon-test-support/-private/get-element.ts
index 24b9247..eb2d756 100644
--- a/addon-test-support/-private/get-element.js
+++ b/addon-test-support/-private/get-element.ts
@@ -1,13 +1,7 @@
 import settings from '../settings';
+import { ElementOrSelector } from './types';
 
-/*
-  @method getElement
-  @param {String|HTMLElement} selectorOrElement
-  @param {HTMLElement} contextEl to query within, query from its contained DOM
-  @return HTMLElement
-  @private
-*/
-export default function getElement(selectorOrElement, contextEl) {
+export default function getElement(selectorOrElement: ElementOrSelector, contextEl: ElementOrSelector) : HTMLElement {
   if (selectorOrElement instanceof HTMLElement) {
     return selectorOrElement;
   }
@@ -17,5 +11,5 @@ export default function getElement(selectorOrElement, contextEl) {
   } else {
     result = document.querySelector(`${settings.rootElement} ${selectorOrElement}`);
   }
-  return result;
+  return result as HTMLElement;
 }
diff --git a/addon-test-support/-private/is-focusable.js b/addon-test-support/-private/is-focusable.js
deleted file mode 100644
index bfd22f9..0000000
--- a/addon-test-support/-private/is-focusable.js
+++ /dev/null
@@ -1,10 +0,0 @@
-export default function isFocusable(el) {
-  let focusableTags = ['INPUT', 'BUTTON', 'LINK', 'SELECT', 'A', 'TEXTAREA'];
-  let { tagName, type } = el;
-
-  if (type === 'hidden') {
-    return false;
-  }
-
-  return focusableTags.indexOf(tagName) > -1 || el.contentEditable;
-}
diff --git a/addon-test-support/-private/is-focusable.ts b/addon-test-support/-private/is-focusable.ts
new file mode 100644
index 0000000..a144806
--- /dev/null
+++ b/addon-test-support/-private/is-focusable.ts
@@ -0,0 +1,15 @@
+const focusableTypes = [
+  HTMLInputElement,
+  HTMLButtonElement,
+  HTMLLinkElement,
+  HTMLSelectElement,
+  HTMLAnchorElement,
+  HTMLTextAreaElement
+];
+export default function isFocusable(el: HTMLElement) : boolean {
+  if (el instanceof HTMLInputElement && el.type === 'hidden') {
+    return false;
+  }
+
+  return focusableTypes.some((type) => el instanceof type) || el.contentEditable === 'true';
+}
diff --git a/addon-test-support/-private/types.ts b/addon-test-support/-private/types.ts
new file mode 100644
index 0000000..5550df4
--- /dev/null
+++ b/addon-test-support/-private/types.ts
@@ -0,0 +1,6 @@
+export type ElementOrSelector = string | HTMLElement;
+export interface EventOptions {
+  bubbles?: boolean,
+  cancelable?: boolean,
+  [propName: string]: any;
+};
diff --git a/addon-test-support/find.js b/addon-test-support/find.ts
similarity index 59%
rename from addon-test-support/find.js
rename to addon-test-support/find.ts
index efaa00d..2b36968 100644
--- a/addon-test-support/find.js
+++ b/addon-test-support/find.ts
@@ -1,5 +1,5 @@
 import getElement from './-private/get-element';
-
+import { ElementOrSelector } from './-private/types';
 /*
   The find test helper uses `querySelector` to search inside the test
   DOM (based on app configuration for the rootElement).
@@ -8,11 +8,8 @@ import getElement from './-private/get-element';
   DOM context to search within.
 
   @method find
-  @param {String} CSS selector to find one or more elements in the test DOM
-  @param {HTMLElement} contextEl to query within, query from its contained DOM
-  @return {null|HTMLElement} null or an element
   @public
 */
-export function find(selector, contextEl) {
+export function find(selector: ElementOrSelector, contextEl: ElementOrSelector) : ElementOrSelector {
   return getElement(selector, contextEl);
 }
diff --git a/addon-test-support/fire-event.js b/addon-test-support/fire-event.ts
similarity index 71%
rename from addon-test-support/fire-event.js
rename to addon-test-support/fire-event.ts
index da5c28b..849370b 100644
--- a/addon-test-support/fire-event.js
+++ b/addon-test-support/fire-event.ts
@@ -1,23 +1,16 @@
 import Ember from 'ember';
+import { EventOptions } from './-private/types';
 
 const { merge } = Ember;
-const DEFAULT_EVENT_OPTIONS = { bubbles: true, cancelable: true };
+const DEFAULT_EVENT_OPTIONS: EventOptions = { bubbles: true, cancelable: true };
 const KEYBOARD_EVENT_TYPES = ['keydown', 'keypress', 'keyup'];
 const MOUSE_EVENT_TYPES = ['click', 'mousedown', 'mouseup', 'dblclick', 'mouseenter', 'mouseleave', 'mousemove', 'mouseout', 'mouseover'];
 
-/*
-  @method fireEvent
-  @param {HTMLElement} element
-  @param {String} type
-  @param {Object} (optional) options
-  @return {Event} The dispatched event
-  @private
-*/
-export function fireEvent(element, type, options = {}) {
+export function fireEvent(element: HTMLElement, type: string, options: EventOptions = {}): Event {
   if (!element) {
     return;
   }
-  let event;
+  let event: Event;
   if (KEYBOARD_EVENT_TYPES.indexOf(type) > -1) {
     event = buildKeyboardEvent(type, options);
   } else if (MOUSE_EVENT_TYPES.indexOf(type) > -1) {
@@ -38,41 +31,19 @@ export function fireEvent(element, type, options = {}) {
   return event;
 }
 
-/*
-  @method buildBasicEvent
-  @param {String} type
-  @param {Object} (optional) options
-  @return {Event}
-  @private
-*/
-function buildBasicEvent(type, options = {}) {
+function buildBasicEvent(type: string, { bubbles = true, cancelable = true, ...otherOptions }: EventOptions = {}): Event {
   let event = document.createEvent('Events');
 
-  let bubbles = options.bubbles !== undefined ? options.bubbles : true;
-  let cancelable = options.cancelable !== undefined ? options.cancelable : true;
-
-  delete options.bubbles;
-  delete options.cancelable;
-
-  // bubbles and cancelable are readonly, so they can be
-  // set when initializing event
+  // bubbles and cancelable are readonly, so they can be set when initializing event
   event.initEvent(type, bubbles, cancelable);
-  merge(event, options);
+  merge(event, otherOptions);
   return event;
 }
 
-/*
-  @method buildMouseEvent
-  @param {String} type
-  @param {Object} (optional) options
-  @return {Event}
-  @private
-*/
-function buildMouseEvent(type, options = {}) {
-  let event;
+function buildMouseEvent(type: string, options: EventOptions = {}): Event {
   try {
-    event = document.createEvent('MouseEvents');
-    let eventOpts = merge(merge({}, DEFAULT_EVENT_OPTIONS), options);
+    let event = document.createEvent('MouseEvents');
+    let eventOpts: EventOptions = merge(merge({}, DEFAULT_EVENT_OPTIONS), options);
     event.initMouseEvent(
       type,
       eventOpts.bubbles,
@@ -89,10 +60,10 @@ function buildMouseEvent(type, options = {}) {
       eventOpts.metaKey,
       eventOpts.button,
       eventOpts.relatedTarget);
-  } catch (e) {
-    event = buildBasicEvent(type, options);
+    return event;
+  } catch(e) {
+    return buildBasicEvent(type, options);
   }
-  return event;
 }
 
 /*
@@ -102,7 +73,7 @@ function buildMouseEvent(type, options = {}) {
   @return {Event}
   @private
 */
-function buildKeyboardEvent(type, options = {}) {
+function buildKeyboardEvent(type: string, options: EventOptions = {}): KeyboardEvent {
   let eventOpts = merge(merge({}, DEFAULT_EVENT_OPTIONS), options);
   let event, eventMethodName;
 
diff --git a/addon-test-support/settings.js b/addon-test-support/settings.ts
similarity index 94%
rename from addon-test-support/settings.js
rename to addon-test-support/settings.ts
index 7ba9004..b0baf4d 100644
--- a/addon-test-support/settings.js
+++ b/addon-test-support/settings.ts
@@ -4,6 +4,7 @@
   @class TestSupportSettings
 */
 class TestSupportSettings {
+  private _rootElement: string;
 
   constructor(init = { rootElement: '#ember-testing' }) {
     this._rootElement = init.rootElement;
diff --git a/app/config/environment.d.ts b/app/config/environment.d.ts
new file mode 100644
index 0000000..999045b
--- /dev/null
+++ b/app/config/environment.d.ts
@@ -0,0 +1,15 @@
+export default config;
+
+/**
+ * Type declarations for
+ *    import config from './config/environment'
+ *
+ * For now these need to be managed by the developer
+ * since different ember addons can materialize new entries.
+ */
+declare namespace config {
+  export var environment: any;
+  export var modulePrefix: string;
+  export var podModulePrefix: string;
+  export var locationType: string;
+}
diff --git a/package.json b/package.json
index 62f5348..8274cf7 100644
--- a/package.json
+++ b/package.json
@@ -26,9 +26,12 @@
   },
   "dependencies": {
     "broccoli-funnel": "^1.1.0",
-    "ember-cli-babel": "^6.1.0"
+    "ember-cli-typescript": "^0.4.0",
+    "ember-cli-babel": "^6.1.0",
+    "typescript": "^2.1"
   },
   "devDependencies": {
+    "@types/ember": "^2.7.34",
     "broccoli-asset-rev": "^2.4.5",
     "ember-cli": "~2.13.1",
     "ember-cli-dependency-checker": "^1.3.0",
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..d0ff592
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES6",
+    "allowJs": true,
+    "moduleResolution": "node",
+    "noEmitOnError": false,
+    "noEmit": true,
+    "baseUrl": ".",
+    "paths": {
+      "ember-native-dom-helpers/tests/*": ["tests/*"],
+      "ember-native-dom-helpers/*": ["app/*"]
+    }
+  },
+  "include": [
+    "app/**/*",
+    "tests/**/*"
+  ]
+}
diff --git a/yarn.lock b/yarn.lock
index 80892c8..eae18db 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12,6 +12,21 @@
   dependencies:
     "@glimmer/di" "^0.2.0"
 
+"@types/ember@^2.7.34":
+  version "2.7.39"
+  resolved "https://registry.yarnpkg.com/@types/ember/-/ember-2.7.39.tgz#6d6716d5b85d25f227ce73012fb4deda485ca9b2"
+  dependencies:
+    "@types/handlebars" "*"
+    "@types/jquery" "*"
+
+"@types/handlebars@*":
+  version "4.0.32"
+  resolved "https://registry.yarnpkg.com/@types/handlebars/-/handlebars-4.0.32.tgz#637e8d945a9354aab47df7125005490fe9f8e592"
+
+"@types/jquery@*":
+  version "2.0.42"
+  resolved "https://registry.yarnpkg.com/@types/jquery/-/jquery-2.0.42.tgz#57cdb1a0f610ddad488adf620e40f8d07ff3ecdf"
+
 abbrev@1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.0.tgz#d0554c2256636e2f56e7c2e5ad183f859428d81f"
@@ -1199,7 +1214,7 @@ broccoli-lint-eslint@^3.1.0:
     json-stable-stringify "^1.0.1"
     md5-hex "^2.0.0"
 
-broccoli-merge-trees@^1.0.0, broccoli-merge-trees@^1.1.0, broccoli-merge-trees@^1.1.1:
+broccoli-merge-trees@^1.0.0, broccoli-merge-trees@^1.1.0, broccoli-merge-trees@^1.1.1, broccoli-merge-trees@^1.1.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/broccoli-merge-trees/-/broccoli-merge-trees-1.2.4.tgz#a001519bb5067f06589d91afa2942445a2d0fdb5"
   dependencies:
@@ -1282,7 +1297,7 @@ broccoli-sri-hash@^2.1.0:
     sri-toolbox "^0.2.0"
     symlink-or-copy "^1.0.1"
 
-broccoli-stew@^1.2.0, broccoli-stew@^1.3.3:
+broccoli-stew@^1.2.0, broccoli-stew@^1.3.3, broccoli-stew@^1.4.0:
   version "1.4.2"
   resolved "https://registry.yarnpkg.com/broccoli-stew/-/broccoli-stew-1.4.2.tgz#9ec4062fd7162c6026561a2fbf64558363aff8d6"
   dependencies:
@@ -1316,6 +1331,21 @@ broccoli-templater@^1.0.0:
     broccoli-stew "^1.2.0"
     lodash.template "^3.3.2"
 
+broccoli-typescript-compiler@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/broccoli-typescript-compiler/-/broccoli-typescript-compiler-1.0.1.tgz#648055f23f4257a1ec434a455c77f5e43bd28d2f"
+  dependencies:
+    broccoli-funnel "^1.0.6"
+    broccoli-merge-trees "^1.1.4"
+    broccoli-plugin "^1.2.1"
+    findup "^0.1.5"
+    fs-tree-diff "^0.5.2"
+    get-caller-file "^1.0.1"
+    heimdalljs "^0.3.0-alpha3"
+    json-stable-stringify "^1.0.1"
+    md5-hex "^1.3.0"
+    walk-sync "^0.3.1"
+
 broccoli-uglify-sourcemap@^1.0.0:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/broccoli-uglify-sourcemap/-/broccoli-uglify-sourcemap-1.5.2.tgz#04f84ab0db539031fa868ccfa563c9932d50cedb"
@@ -1584,6 +1614,10 @@ colors@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/colors/-/colors-1.1.2.tgz#168a4701756b6a7f51a12ce0c97bfa28c084ed63"
 
+colors@~0.6.0-1:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-0.6.2.tgz#2423fe6678ac0c5dae8852e5d0e5be08c997abcc"
+
 columnify@~1.5.4:
   version "1.5.4"
   resolved "https://registry.yarnpkg.com/columnify/-/columnify-1.5.4.tgz#4737ddf1c7b69a8a7c340570782e947eec8e78bb"
@@ -1609,6 +1643,10 @@ commander@2.9.0, commander@^2.5.0, commander@^2.6.0, commander@^2.9.0:
   dependencies:
     graceful-readlink ">= 1.0.0"
 
+commander@~2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.1.0.tgz#d121bbae860d9992a3d517ba96f56588e47c6781"
+
 commoner@~0.10.3:
   version "0.10.8"
   resolved "https://registry.yarnpkg.com/commoner/-/commoner-0.10.8.tgz#34fc3672cd24393e8bb47e70caa0293811f4f2c5"
@@ -1961,21 +1999,7 @@ ember-cli-babel@^5.1.5, ember-cli-babel@^5.1.7:
     ember-cli-version-checker "^1.0.2"
     resolve "^1.1.2"
 
-ember-cli-babel@^6.0.0-beta.4, ember-cli-babel@^6.0.0-beta.7:
-  version "6.0.0-beta.9"
-  resolved "https://registry.yarnpkg.com/ember-cli-babel/-/ember-cli-babel-6.0.0-beta.9.tgz#b597d52f12d4429cd5716b55f749ebf6144b7b16"
-  dependencies:
-    amd-name-resolver "0.0.6"
-    babel-plugin-transform-es2015-modules-amd "^6.24.0"
-    babel-polyfill "^6.16.0"
-    babel-preset-env "^1.2.0"
-    broccoli-babel-transpiler "^6.0.0"
-    broccoli-funnel "^1.0.0"
-    broccoli-source "^1.1.0"
-    clone "^2.0.0"
-    ember-cli-version-checker "^1.2.0"
-
-ember-cli-babel@^6.1.0:
+ember-cli-babel@^6.0.0-beta.4, ember-cli-babel@^6.0.0-beta.7, ember-cli-babel@^6.1.0:
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/ember-cli-babel/-/ember-cli-babel-6.1.0.tgz#d9c83a7d0c67cc8a3ccb9bd082971c3593e54fad"
   dependencies:
@@ -2191,6 +2215,19 @@ ember-cli-test-loader@^2.0.0:
   dependencies:
     ember-cli-babel "^6.0.0-beta.7"
 
+ember-cli-typescript@^0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/ember-cli-typescript/-/ember-cli-typescript-0.4.0.tgz#9fe1ecee835ede60d5977e2801a0a964f1837e2f"
+  dependencies:
+    broccoli-funnel "^1.0.6"
+    broccoli-merge-trees "^1.1.4"
+    broccoli-plugin "^1.2.1"
+    broccoli-source "^1.1.0"
+    broccoli-stew "^1.4.0"
+    broccoli-typescript-compiler "^1.0.1"
+    debug "^2.2.0"
+    ember-cli-babel "^5.1.7"
+
 ember-cli-uglify@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/ember-cli-uglify/-/ember-cli-uglify-1.2.0.tgz#3208c32b54bc2783056e8bb0d5cfe9bbaf17ffb2"
@@ -2871,6 +2908,13 @@ findup-sync@^0.4.2, findup-sync@^0.4.3:
     micromatch "^2.3.7"
     resolve-dir "^0.1.0"
 
+findup@^0.1.5:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/findup/-/findup-0.1.5.tgz#8ad929a3393bac627957a7e5de4623b06b0e2ceb"
+  dependencies:
+    colors "~0.6.0-1"
+    commander "~2.1.0"
+
 fireworm@^0.7.0:
   version "0.7.1"
   resolved "https://registry.yarnpkg.com/fireworm/-/fireworm-0.7.1.tgz#ccf20f7941f108883fcddb99383dbe6e1861c758"
@@ -3074,7 +3118,7 @@ generate-object-property@^1.1.0:
   dependencies:
     is-property "^1.0.0"
 
-get-caller-file@^1.0.0:
+get-caller-file@^1.0.0, get-caller-file@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.2.tgz#f702e63127e7e231c160a80c1554acb70d5047e5"
 
@@ -3306,6 +3350,12 @@ heimdalljs@^0.2.0, heimdalljs@^0.2.1, heimdalljs@^0.2.3:
   dependencies:
     rsvp "~3.2.1"
 
+heimdalljs@^0.3.0-alpha3:
+  version "0.3.3"
+  resolved "https://registry.yarnpkg.com/heimdalljs/-/heimdalljs-0.3.3.tgz#e92d2c6f77fd46d5bf50b610d28ad31755054d0b"
+  dependencies:
+    rsvp "~3.2.1"
+
 hoek@2.x.x:
   version "2.16.3"
   resolved "https://registry.yarnpkg.com/hoek/-/hoek-2.16.3.tgz#20bb7403d3cea398e91dc4710a8ff1b8274a25ed"
@@ -4230,7 +4280,7 @@ matcher-collection@^1.0.0, matcher-collection@^1.0.1:
   dependencies:
     minimatch "^3.0.2"
 
-md5-hex@^1.0.2:
+md5-hex@^1.0.2, md5-hex@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/md5-hex/-/md5-hex-1.3.0.tgz#d2c4afe983c4370662179b8cad145219135046c4"
   dependencies:
@@ -5067,7 +5117,7 @@ read@1, read@~1.0.1, read@~1.0.7:
   dependencies:
     mute-stream "~0.0.4"
 
-"readable-stream@1 || 2", readable-stream@^2.0.2, readable-stream@~2.0.5:
+"readable-stream@1 || 2", readable-stream@^2, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.0.2, readable-stream@~2.0.5:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
   dependencies:
@@ -5078,7 +5128,7 @@ read@1, read@~1.0.1, read@~1.0.7:
     string_decoder "~0.10.x"
     util-deprecate "~1.0.1"
 
-readable-stream@^2, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.1.4, readable-stream@^2.2.2:
+readable-stream@^2.1.4, readable-stream@^2.2.2:
   version "2.2.9"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.2.9.tgz#cf78ec6f4a6d1eb43d26488cac97f042e74b7fc8"
   dependencies:
@@ -5519,13 +5569,13 @@ signal-exit@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
 
-silent-error@^1.0.0, silent-error@^1.0.1:
+silent-error@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/silent-error/-/silent-error-1.0.1.tgz#71b7d503d1c6f94882b51b56be879b113cb4822c"
   dependencies:
     debug "^2.2.0"
 
-silent-error@^1.1.0:
+silent-error@^1.0.1, silent-error@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/silent-error/-/silent-error-1.1.0.tgz#2209706f1c850a9f1d10d0d840918b46f26e1bc9"
   dependencies:
@@ -6003,6 +6053,10 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
+typescript@^2.1:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.3.2.tgz#f0f045e196f69a72f06b25fd3bd39d01c3ce9984"
+
 uc.micro@^1.0.0, uc.micro@^1.0.1, uc.micro@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.3.tgz#7ed50d5e0f9a9fb0a573379259f2a77458d50192"