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: ['5857', '521', '2841', '9179', '3045', '6821', 'B', 'W', 'Q', '4425', 'I', 'm', 'o', 't', '5251', 'Z', '8895', 'X', 'N', 'V', 'J', '6235', '9041', 't', '5533', '2351', '2551', '947', 'X', 'q', 'h', '9683', '1685', 't', '6309', '6431', '4673', '4737']

5857, 521, 2841, 9179, 3045, 6821, 2, 23, 17, 4425, 9, 13, 15, 20, 5251, 26, 8895, 24, 14, 22, 10, 6235, 9041, 20, 5533, 2351, 2551, 947, 24, 17, 8, 9683, 1685, 20, 6309, 6431, 4673, 4737