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.

['6513', '9497', '8963', 'E']
6513, 9497, 8963, 5

['q', 'B', 'U', '9387']
17, 2, 21, 9387

['8307', '1583', 'C', 'n', 'k', '2117', 'N', '1343', '7961', '4081', 'D', '7351', '2317', 'k', 'r', 'x', '5951', '4713', '6019', 'o', 'X', '2329', 'y', '1921', '5955', 'l', '4303', 'f', 'v', '5149', 'm', '3299', 'S']

8307, 1583, 3, 14, 11, 2117, 14, 1343, 7961, 4081, 4, 7351, 2317, 11, 18, 24, 5951, 4713, 6019, 15, 24, 2329, 25, 1921, 5955, 12, 4303, 6, 22, 5149, 13, 3299, 19