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', '903', 'N', 'n', '1959', 'U', 'Z', 'v', 'f', '6207', '4947', '9471', 'v', '481', 'Z', '163']

SOLUTION: 4, 903, 14, 14, 1959, 21, 26, 22, 6, 6207, 4947, 9471, 22, 481, 26, 163

PROBLEM: ['i', 'P', '227', '5575', 'O', 'l', '9041', 'q', '3695', '6189', 'x', 'z', 'R', '297', 'b', '5055', 'y', 'k', '4049', 'q', 'Z', '635', '5995', '2277', '6733']

SOLUTION: 9, 16, 227, 5575, 15, 12, 9041, 17, 3695, 6189, 24, 26, 18, 297, 2, 5055, 25, 11, 4049, 17, 26, 635, 5995, 2277, 6733

PROBLEM: ['y', 'Y', '707', 'x', 'o', 'T', 'Q', 't', 'G', 'F', '6043', 'X', 'S', '6739', 'v', '2201', '889', 'r', 'J', 'S', '1357', 'c', '5781', 'v', 'N', '6117', '187', '2747', '4651', '8547', '5737', 'S', '8345', 'P', 'g', 'u']

SOLUTION:
25, 25, 707, 24, 15, 20, 17, 20, 7, 6, 6043, 24, 19, 6739, 22, 2201, 889, 18, 10, 19, 1357, 3, 5781, 22, 14, 6117, 187, 2747, 4651, 8547, 5737, 19, 8345, 16, 7, 21