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: ['1315', '4337', '877', '1395', '5039', '5537', '2249', '187', 'k', '2499', 'j', 'I', '2609', 'i', '1405', '6159', 'O', 'h', '7567', 'u', '105', '4017', 'y', 'O', '3739', '2501', 'v', 'D', '8021']

SOLUTION: 1315, 4337, 877, 1395, 5039, 5537, 2249, 187, 11, 2499, 10, 9, 2609, 9, 1405, 6159, 15, 8, 7567, 21, 105, 4017, 25, 15, 3739, 2501, 22, 4, 8021

PROBLEM: ['k', '1', '8755', 'H', '7133', '2895', '609', 'p', '8245', '7399', 'v', 'P', '1649', 'i', '1565', '911', '1463', 'Y', '2123', 'w']

SOLUTION: 11, 1, 8755, 8, 7133, 2895, 609, 16, 8245, 7399, 22, 16, 1649, 9, 1565, 911, 1463, 25, 2123, 23

PROBLEM: ['4459', 'A', 'M', '8621', '4247', '2255']

SOLUTION:
4459, 1, 13, 8621, 4247, 2255