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: ['o', '8847', 'z', 'p', '707', '6917', '2251', 'P', 'W', '1371', '8065', 'l', 'O', '1737', '3839', '85', '3885', 'M', '6597', 'S', '2179', 'Q', 'V', 'T', 'i', 'Q', 'B', 'p', 'i', 'C', '5623', '9617', 'u', '5701', 'u', 'U', 'I', 'y']

15, 8847, 26, 16, 707, 6917, 2251, 16, 23, 1371, 8065, 12, 15, 1737, 3839, 85, 3885, 13, 6597, 19, 2179, 17, 22, 20, 9, 17, 2, 16, 9, 3, 5623, 9617, 21, 5701, 21, 21, 9, 25