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: ['I', 'l', '3397', '9913', 'q', '9631', '2829', '6489', 'S', '7083', 'd', 'h', '7433']

9, 12, 3397, 9913, 17, 9631, 2829, 6489, 19, 7083, 4, 8, 7433