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: ['I', '8349', '77', '2311', '1681', 'k', 'Y', '5097', '1457', '1781', 'Q', 'Z', '8551', 'b', 'W', 'W', '4289', 'M', '2859', 'e', '1531', '5993', 'f', '3023', '707', 'r']

9, 8349, 77, 2311, 1681, 11, 25, 5097, 1457, 1781, 17, 26, 8551, 2, 23, 23, 4289, 13, 2859, 5, 1531, 5993, 6, 3023, 707, 18