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: ['6559', '7123', '2937', '8929', 'q', 'L', 'Y', '3489', '6089', '6641', 'J', 'k', 'K', '5037', 'h', '9935', '2869', 'I', '6177', 'n', 'h', '5165', 'P', 's', '9085', 'l', '5925', 'Z', 'u', '2973', 'y', 'c', '6301', 'x', 'O', 'o', '3677', 'B']

6559, 7123, 2937, 8929, 17, 12, 25, 3489, 6089, 6641, 10, 11, 11, 5037, 8, 9935, 2869, 9, 6177, 14, 8, 5165, 16, 19, 9085, 12, 5925, 26, 21, 2973, 25, 3, 6301, 24, 15, 15, 3677, 2