Creating a template for jeremymanning's solution to problem 2976

Author: jeremymanning

problems/2976/jeremymanning.md

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+# [Problem 2976: Minimum Cost to Convert String I](https://leetcode.com/problems/minimum-cost-to-convert-string-i/description/?envType=daily-question)
+
+## Initial thoughts (stream-of-consciousness)
+
+## Refining the problem, round 2 thoughts
+
+## Attempted solution(s)
+```python
+class Solution:  # paste your code here!
+    ...
+```