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.

['U', '9707', '5367', '533', 'C', 'g', '5039', '4489', '8129', '5419', 'w', 'P', '4025', '641', 'B', '7423', 'e', 'Q', '4235', '9235', 'y', 'r']
21, 9707, 5367, 533, 3, 7, 5039, 4489, 8129, 5419, 23, 16, 4025, 641, 2, 7423, 5, 17, 4235, 9235, 25, 18

['U', '1531', 't', '6929', 'P', '9619', 'G', 'g', '8511']
21, 1531, 20, 6929, 16, 9619, 7, 7, 8511

['L', 'u', 'j', '3151', 'R', 'U', 'B', '6079', '9047', '9381', '6897', '5561', 'I', '6243', '5677', 'U', '6457', 'm', '1365', 'x', '4379']

12, 21, 10, 3151, 18, 21, 2, 6079, 9047, 9381, 6897, 5561, 9, 6243, 5677, 21, 6457, 13, 1365, 24, 4379