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: ['m', '5481', '113', '7209', '9061', '211', 'B', 'b', '855', '8923', 'v', 'I', 'H', 'g', 'G', '6977', 't']

13, 5481, 113, 7209, 9061, 211, 2, 2, 855, 8923, 22, 9, 8, 7, 7, 6977, 20