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', '3973', 'k', '4209', '9587', 'i', 'v', 'Q', '6333', 'B', 'r', '3549', '2173', 'i', 'f', '581', 'e', 'G', '2813', 'X', '3333', '579', 'e', 'G', 'l', 'j', '8931', 'r', '9819', 'y', '6411', 'j', 'b', 'l', '2897', 'H', '2425']

13, 3973, 11, 4209, 9587, 9, 22, 17, 6333, 2, 18, 3549, 2173, 9, 6, 581, 5, 7, 2813, 24, 3333, 579, 5, 7, 12, 10, 8931, 18, 9819, 25, 6411, 10, 2, 12, 2897, 8, 2425