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', '8585', 'T', '9947', '2275', '7577', '7651', '4841', '9491', 'N', '8437']

10, 8585, 20, 9947, 2275, 7577, 7651, 4841, 9491, 14, 8437