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: ['Y', 'M', '1733', '2363', '1345', 'Q', '2731', 'z', 'g', 'y', 'l', 'C', '3495', 'M', 'z', '79', 'u', '3685', 'h', 's', '7897', 'i']

25, 13, 1733, 2363, 1345, 17, 2731, 26, 7, 25, 12, 3, 3495, 13, 26, 79, 21, 3685, 8, 19, 7897, 9