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: ['z', 'I', 'S', 'T', 'G', 'o', '3457', '1473', '4119', 'e', '4823', '4439', '4753', 'B', '69', '1191', 'd', 'y', '9673', 'i', 'f', '3477', 'p', 'z', 'f', 'o', '2995', '4587', 'b', 'B', 'x', 'p', 'w', 'd', 'S', 'O', '9693', 'Y']

26, 9, 19, 20, 7, 15, 3457, 1473, 4119, 5, 4823, 4439, 4753, 2, 69, 1191, 4, 25, 9673, 9, 6, 3477, 16, 26, 6, 15, 2995, 4587, 2, 2, 24, 16, 23, 4, 19, 15, 9693, 25