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: ['D', '8201', 'o', 'O', 'a', 'a', '2475', 'k', '3099', '9789', 'f', 'i', 'k', 'H', 'f', 'Q', 'L', 'D', '3857', '645', 'g']

SOLUTION: 4, 8201, 15, 15, 1, 1, 2475, 11, 3099, 9789, 6, 9, 11, 8, 6, 17, 12, 4, 3857, 645, 7

PROBLEM: ['W', '7533', '1447', '5111', '2125', 'F', 't', '1481', 'w', 'x', '6279', 'Y', '4167', 'P', 'y', '663', 'W', 'm', '3717', 'n']

SOLUTION: 23, 7533, 1447, 5111, 2125, 6, 20, 1481, 23, 24, 6279, 25, 4167, 16, 25, 663, 23, 13, 3717, 14

PROBLEM: ['5923', 'A', 'Y', 'P', '5741', '4423', 'd', 'I', '7727', 'd', 's', 'O']

SOLUTION:
5923, 1, 25, 16, 5741, 4423, 4, 9, 7727, 4, 19, 15