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: ['N', '5983', 's', 'D', 'm', 'P', '8385', 'Z', '9903', 'f', '7649', '2181', '5189', '4757', 'p', '1139', '5429', 'e', '2023', '7431']

SOLUTION: 14, 5983, 19, 4, 13, 16, 8385, 26, 9903, 6, 7649, 2181, 5189, 4757, 16, 1139, 5429, 5, 2023, 7431

PROBLEM: ['U', '9707', '5367', '533', 'C', 'g', '5039', '4489', '8129', '5419', 'w', 'P', '4025', '641', 'B', '7423', 'e', 'Q', '4235', '9235', 'y', 'r']

SOLUTION: 21, 9707, 5367, 533, 3, 7, 5039, 4489, 8129, 5419, 23, 16, 4025, 641, 2, 7423, 5, 17, 4235, 9235, 25, 18

PROBLEM: ['p', '2253', 'j', '8787', 'g', '3283', 'X', 'F', 'W', '8997', '9929', '3625', 'X', '8429', 'c', '2007', 'S', '9275', '2491', 'G', 'l', 'j', 'u']

SOLUTION:
16, 2253, 10, 8787, 7, 3283, 24, 6, 23, 8997, 9929, 3625, 24, 8429, 3, 2007, 19, 9275, 2491, 7, 12, 10, 21