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: ['2135', '3765', 'v', '9885', 'A', '3681', '2493', 's', 'X', 'b', '4339', 'n', '1837', '8921', '6753', 'O', 'c', '9639', 'z', '4081', '5511', 'm', '6261', 'P', 'K', 'J', '5375', '4447', '2023', '6049', 'k', '6281', '4469', 'P', '2909', '2553', '8295']

2135, 3765, 22, 9885, 1, 3681, 2493, 19, 24, 2, 4339, 14, 1837, 8921, 6753, 15, 3, 9639, 26, 4081, 5511, 13, 6261, 16, 11, 10, 5375, 4447, 2023, 6049, 11, 6281, 4469, 16, 2909, 2553, 8295