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: ['5543', '21', 'g', 'd', 'h', '9461', '6537', '939', 'J', 'g', 'd', '5041', '5489', '9089', 'e', 'c']

5543, 21, 7, 4, 8, 9461, 6537, 939, 10, 7, 4, 5041, 5489, 9089, 5, 3