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: ['O', '8619', '3237', '7607', '4293', 'Q', 'W', 'W', '2127', '2495', 'Y', 'B', 'G', '5271', 'A', 'I', '1907', 'C', 'X', 'W', 'K', 'R', 'z', '681', 'q', 'u', 'g', '8007', '8883', 'j', 'T', '8333', 'i', 'k', 'B', 'h', 'h']

15, 8619, 3237, 7607, 4293, 17, 23, 23, 2127, 2495, 25, 2, 7, 5271, 1, 9, 1907, 3, 24, 23, 11, 18, 26, 681, 17, 21, 7, 8007, 8883, 10, 20, 8333, 9, 11, 2, 8, 8