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: ['8851', 'k', 'x', 'O', '9071', 'C', 'O', 'k', 'd', '5141', 'e', 'l', '4239', 'S', '2521', 'G', 'y', 'v', 't', '5275', '8869', '7553', '1857', '7843', '2203', 'v', '7867', 'D', '299', '2347', 'Z', 'K']

SOLUTION: 8851, 11, 24, 15, 9071, 3, 15, 11, 4, 5141, 5, 12, 4239, 19, 2521, 7, 25, 22, 20, 5275, 8869, 7553, 1857, 7843, 2203, 22, 7867, 4, 299, 2347, 26, 11

PROBLEM: ['7501', 'c', 'n', '3551', 'U', '8239', 'L', '3149', '9399', 'a', '2763', '2461', 'p']

SOLUTION: 7501, 3, 14, 3551, 21, 8239, 12, 3149, 9399, 1, 2763, 2461, 16

PROBLEM: ['523', 'q', '3917', '2439', '8599', 'l', 's', '1465', 'n', 'D', 'Z', '1901', 'G', '1639']

SOLUTION:
523, 17, 3917, 2439, 8599, 12, 19, 1465, 14, 4, 26, 1901, 7, 1639