Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['C', 'k', 'm', '3953', 'Y', '8561', 'w', 'y', 'Z', '2775', 'S', '8981', '9579', '2815', '7401', 'r', '6095', 'W', '3149', '3665', 'N', '8191', 'y', '5001', 'Z', '4035', '5047', 'o', 'k', 'B', '5317', 'Y', 'B', '6061', '8451', 'H']

3, 11, 13, 3953, 25, 8561, 23, 25, 26, 2775, 19, 8981, 9579, 2815, 7401, 18, 6095, 23, 3149, 3665, 14, 8191, 25, 5001, 26, 4035, 5047, 15, 11, 2, 5317, 25, 2, 6061, 8451, 8