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: ['B', 'y', '8381', 'G', '7739', '7455', 'J', '5381', '8425', '8603', 'u', '727', 'l', 'N', 'q', 'a', 'C', 'D', '4371', 'H', 'J', '2103', '4683', '5867', 'M', '2059']

2, 25, 8381, 7, 7739, 7455, 10, 5381, 8425, 8603, 21, 727, 12, 14, 17, 1, 3, 4, 4371, 8, 10, 2103, 4683, 5867, 13, 2059