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: ['A', '2639', '2991', '4739', 'A', '3755', '3587', '1129', 'w', 'h', '9329', 'Q', '5659', '1271', 'X', '5583', '5589', 's', '3643', '5469', 'W', '5271', 'P', '5069', '5927', 'O', 'M', 'w', 'v']

1, 2639, 2991, 4739, 1, 3755, 3587, 1129, 23, 8, 9329, 17, 5659, 1271, 24, 5583, 5589, 19, 3643, 5469, 23, 5271, 16, 5069, 5927, 15, 13, 23, 22