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: ['m', 'r', 'n', '8993', '2425', 'M', 'D', '5337', 'b', 'g', 'N', '7287', 'e', 'k', 'q', 'p', 'T', '3273', 'n']

13, 18, 14, 8993, 2425, 13, 4, 5337, 2, 7, 14, 7287, 5, 11, 17, 16, 20, 3273, 14