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: ['J', '3161', 'm', '5889', '5417', '8057', 'c', 'q', '6121', '1325', '481', 'b', '6443', '7483', 'I', 'H']

10, 3161, 13, 5889, 5417, 8057, 3, 17, 6121, 1325, 481, 2, 6443, 7483, 9, 8