TASK 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.
PROBLEM: ['9973', '4501', '3257', '7393', '2041', '1173', 'f', '3299', '1399', 'S', 'a', '7829', '2557', '6051', '7063', '2537', 'k', 'b', 'W', '9133', 'd']

SOLUTION: 9973, 4501, 3257, 7393, 2041, 1173, 6, 3299, 1399, 19, 1, 7829, 2557, 6051, 7063, 2537, 11, 2, 23, 9133, 4

PROBLEM: ['3869', '5187', 'm', 'Z', '8285', 'A', 'c', '7195', 'J', '4089', '4303', 'U', '5327', '9395', '7525', '5589', 'P', '8303', '9741', '7733', 'O', 'l', 'w', 'z', 'q', 'H', '9763', '2215', 'M', '9907', '843', 'N']

SOLUTION: 3869, 5187, 13, 26, 8285, 1, 3, 7195, 10, 4089, 4303, 21, 5327, 9395, 7525, 5589, 16, 8303, 9741, 7733, 15, 12, 23, 26, 17, 8, 9763, 2215, 13, 9907, 843, 14

PROBLEM: ['1563', '949', 'E', 'T', '5751', '7039', '2057', '5117', 'q', 'j', '895', '9935', 'O', 'U', '2413', 'p', 'm', '1681', 'c', 'k', 'b', 'g', 'A', 'v', '5637', 'a', 'w', '1687', '5985']

SOLUTION:
1563, 949, 5, 20, 5751, 7039, 2057, 5117, 17, 10, 895, 9935, 15, 21, 2413, 16, 13, 1681, 3, 11, 2, 7, 1, 22, 5637, 1, 23, 1687, 5985