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: ['z', 'f', '5867', '3475', 'A', '4535', 'm', 'S', '1189', '3275', '3249', 'a', 'K', '2015', 'W', '6543', 'O', 'K', 'E', 'C', 'O', '5889', '6795', 'M', 'A', 'p', '4315', '9367', 'i', '5781', '875', '7125', 'i', 'H', '4399', '3707', '7141', 'E', 'z']

SOLUTION: 26, 6, 5867, 3475, 1, 4535, 13, 19, 1189, 3275, 3249, 1, 11, 2015, 23, 6543, 15, 11, 5, 3, 15, 5889, 6795, 13, 1, 16, 4315, 9367, 9, 5781, 875, 7125, 9, 8, 4399, 3707, 7141, 5, 26

PROBLEM: ['C', 'S', 'C', 'T', '4187', '8575', '405', 'N', '7281']

SOLUTION: 3, 19, 3, 20, 4187, 8575, 405, 14, 7281

PROBLEM: ['l', 'Y', 'L', '5279', 'j', 's', '7775', 'd', 'K', '8831', '8369', '5505', '3275', 'o', '6789', '1699', 'L', '4047', 'G', 'R', 'd', 'M', 'I', 'd', 's', '9857', 'T', 'L', 'D', '755', 'N', 'x']

SOLUTION:
12, 25, 12, 5279, 10, 19, 7775, 4, 11, 8831, 8369, 5505, 3275, 15, 6789, 1699, 12, 4047, 7, 18, 4, 13, 9, 4, 19, 9857, 20, 12, 4, 755, 14, 24