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: ['9949', '9521', 'K', '7225', '4175', '3515', '6449', '447', '2399', 'j', 'y', 'B', '1159', 'J', '2309', '521', '1621', '6703', '2443', 'e', '8095', 'E', '5763', '4819', 'r', '4051', 'k', '443', 'C', 'w', 'O', 'r', '1381', '9477', '9751', '5275', '297']

9949, 9521, 11, 7225, 4175, 3515, 6449, 447, 2399, 10, 25, 2, 1159, 10, 2309, 521, 1621, 6703, 2443, 5, 8095, 5, 5763, 4819, 18, 4051, 11, 443, 3, 23, 15, 18, 1381, 9477, 9751, 5275, 297