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: ['8167', '1455', '403', '3165', '5021', 'H', '1265', '1383', '7359', 'd', '3177', '6781', '1999', 'h', '6425', '3329', '3491', 'L', 'L', '5971', 'L', '6095', 'u', '2831', '5573']

8167, 1455, 403, 3165, 5021, 8, 1265, 1383, 7359, 4, 3177, 6781, 1999, 8, 6425, 3329, 3491, 12, 12, 5971, 12, 6095, 21, 2831, 5573