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: ['4981', '8523', '3359', 'i', '7205', '5013', 'Q', '2523', 'b', '8699', '3195', '3019', '8865', 'm', '2971', 'G', 'g', 'P', 'e', 'b', '9131', 'L', '1657', 'u', 'l', 's', '2577', 't', 'H']

4981, 8523, 3359, 9, 7205, 5013, 17, 2523, 2, 8699, 3195, 3019, 8865, 13, 2971, 7, 7, 16, 5, 2, 9131, 12, 1657, 21, 12, 19, 2577, 20, 8