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: ['4173', 'o', '7261', '9517', 'R', '4893', '5629', 't', 'A', 'q', 'K', '887', '9413', 'w', '8039', '3497', 'g', 'I', '8959', 'v', 'Q', '2129']

4173, 15, 7261, 9517, 18, 4893, 5629, 20, 1, 17, 11, 887, 9413, 23, 8039, 3497, 7, 9, 8959, 22, 17, 2129