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: ['5157', 'g', 'Y', 'g', '1365', '1497', '7489', 'E', '9687', 'N', 'N', 'm', 'y', 'W', '3405', 'v', 'I', 'H', '8193', '2995', '5901', 'Q', 'D', '9893']

5157, 7, 25, 7, 1365, 1497, 7489, 5, 9687, 14, 14, 13, 25, 23, 3405, 22, 9, 8, 8193, 2995, 5901, 17, 4, 9893