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: ['e', 'm', '1691', '6629', '4457', 'N', 'y', '1181', '5407', '4329', 'q', '907', 'P', '2105', '5277', '3939', '8849', 'X', '7975', 'c', '2883', '7017']

5, 13, 1691, 6629, 4457, 14, 25, 1181, 5407, 4329, 17, 907, 16, 2105, 5277, 3939, 8849, 24, 7975, 3, 2883, 7017