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', '9699', '3477', '5159', 'h', 'y', '3447', 'E', 'E', '835', '9681', 'q', '2633', 's', 'v', '4955', 'G', 'i', 'A', 'C', '5339', 'z', '1691', '2287', '8335', 'l']

13, 9699, 3477, 5159, 8, 25, 3447, 5, 5, 835, 9681, 17, 2633, 19, 22, 4955, 7, 9, 1, 3, 5339, 26, 1691, 2287, 8335, 12