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: ['57', '769', '7077', '4919', 'U', 'y', '5221', '5699', 'S', 'p', '1425', 'I', '9133', 'v', 'P', '2571', 'D', 'A', '4851', '7191', 'X', 'm', 'R', '8093', 'c', 'X', 'i', 'K', '5399', '2329', 'C', '9965', '2205', '7069', '4733', '989', '6129']

57, 769, 7077, 4919, 21, 25, 5221, 5699, 19, 16, 1425, 9, 9133, 22, 16, 2571, 4, 1, 4851, 7191, 24, 13, 18, 8093, 3, 24, 9, 11, 5399, 2329, 3, 9965, 2205, 7069, 4733, 989, 6129