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: ['9173', 'H', '2473', '8013', '3091', '1375', '4955', '1467', 'x', 'g', '7935', 'h', '6711', '2965', '4585', '6017', 'h', '8287']

9173, 8, 2473, 8013, 3091, 1375, 4955, 1467, 24, 7, 7935, 8, 6711, 2965, 4585, 6017, 8, 8287