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: ['8171', '7867', 'y', 'Q', '6235', '7637', '2517', '7433', 'W', 'Q', 'W', 'D', 'l', '3661', '3109', '2751', 'i', 'D', 'W']

8171, 7867, 25, 17, 6235, 7637, 2517, 7433, 23, 17, 23, 4, 12, 3661, 3109, 2751, 9, 4, 23