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: ['3515', '5271', '4907', '4935', '7597', '5125', 'g', '8455', 'j', 'Y', '4277', '9577', 'W', '5615', 'u', 'r', '5171']

SOLUTION: 3515, 5271, 4907, 4935, 7597, 5125, 7, 8455, 10, 25, 4277, 9577, 23, 5615, 21, 18, 5171

PROBLEM: ['8371', 'C', '2189', 'h', '3743', 'H', '5141', 'v', '1039', 'U', '569', '4505', 'D', '6365', '1407', '6675', '197', 'k', 'V', 'C', 'm', 'l', 'v', '6831', 'W', '2467', '3043', 'x', 'I', 'M', 'L', 'l', '7395']

SOLUTION:
8371, 3, 2189, 8, 3743, 8, 5141, 22, 1039, 21, 569, 4505, 4, 6365, 1407, 6675, 197, 11, 22, 3, 13, 12, 22, 6831, 23, 2467, 3043, 24, 9, 13, 12, 12, 7395