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: ['6239', 'I', '6021', 'e', 'C', 'D', 'n', 'C', 'k', '5171', 'K', '3579', '1607', '7349', '3179', 'N', 'i', '8067', 'D', 'c', 'P', 'K', 'W', '2487', 'G', 'e', '2385', 'A', 'o']

SOLUTION: 6239, 9, 6021, 5, 3, 4, 14, 3, 11, 5171, 11, 3579, 1607, 7349, 3179, 14, 9, 8067, 4, 3, 16, 11, 23, 2487, 7, 5, 2385, 1, 15

PROBLEM: ['q', '8519', 'T', '6859', '5397', '3753', '2057', '5723', 'T', 'R', '7807', 'h', '9507', '7865', '8513', '2309', 'j', 'n', 'P', 'a', '8971', 'U', '7927', '875', '3315', 'E', 't']

SOLUTION: 17, 8519, 20, 6859, 5397, 3753, 2057, 5723, 20, 18, 7807, 8, 9507, 7865, 8513, 2309, 10, 14, 16, 1, 8971, 21, 7927, 875, 3315, 5, 20

PROBLEM: ['q', '3183', 'Q', 'i', 't', 'j', 'y', 'Y', '8171', 't', '4421', '3315', 'd', '3853', '6475', 'H', 'Z', 'P', '8101', '3383', '8723', '9493']

SOLUTION:
17, 3183, 17, 9, 20, 10, 25, 25, 8171, 20, 4421, 3315, 4, 3853, 6475, 8, 26, 16, 8101, 3383, 8723, 9493