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: ['d', '4099', 'c', '6587', '7951', '6041', '5245', 'J', '3521', 'x', '769', '7213', 'L', '8477', 'g', '419', '2485', '7545', 'I', '7405', '1047', 'T', 'k', '731', '3503', '3373', 'Y', '8691']

4, 4099, 3, 6587, 7951, 6041, 5245, 10, 3521, 24, 769, 7213, 12, 8477, 7, 419, 2485, 7545, 9, 7405, 1047, 20, 11, 731, 3503, 3373, 25, 8691