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: ['3105', '3751', '2925', 'A', 'U', '6983', '9079', '3529', '8371', 'o', '1361', '3217', 'd', 'E', 'F', 'X', 'P', '5681', '229', '7647', '4175', 'k', 'S', '6501', 'e', '2441', 'j', 'a', 's', '1215', '9371', '5639', 'a', 'o', 'x', 'X', 'z']

3105, 3751, 2925, 1, 21, 6983, 9079, 3529, 8371, 15, 1361, 3217, 4, 5, 6, 24, 16, 5681, 229, 7647, 4175, 11, 19, 6501, 5, 2441, 10, 1, 19, 1215, 9371, 5639, 1, 15, 24, 24, 26