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: ['8893', '2619', 'P', '7303', '7627', 'T', 'p', 'J', '5751', '2885', '7617', '4111', 'U', 'm', '6055', 'P', 'l', '4333', '6227']

8893, 2619, 16, 7303, 7627, 20, 16, 10, 5751, 2885, 7617, 4111, 21, 13, 6055, 16, 12, 4333, 6227