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', 'z', 'c', 'K', 'T', 'C', '8509', '6371', 'L', '9467', 'i', 'm', 'U', 'e', '8085', '7819', '2079', '457', 'M', 'p', 'A', '8663', 'k', 'b']

4, 26, 3, 11, 20, 3, 8509, 6371, 12, 9467, 9, 13, 21, 5, 8085, 7819, 2079, 457, 13, 16, 1, 8663, 11, 2