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: ['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: ['9307', 't', '7521', '1787', 'K', 'R', 'S', 'q', 'Q', '9679', '6415', 'V', '9593', 'X', 'U', '707', '3367', 'J', 'H', 'Q', '9889', 'w', 'd', '7075', 'L', 'F', 'j', 't', 'W', 'r', '4743', '2469', 'D', 's', '4687', 'n']

SOLUTION: 9307, 20, 7521, 1787, 11, 18, 19, 17, 17, 9679, 6415, 22, 9593, 24, 21, 707, 3367, 10, 8, 17, 9889, 23, 4, 7075, 12, 6, 10, 20, 23, 18, 4743, 2469, 4, 19, 4687, 14

PROBLEM: ['9597', 'O', 'T', 'U', 'y', 's', '4749', 'r', '6571', '5431', '2503', 'P', '4513', '5025', 't', '9045', '7997', '3329', 'R']

SOLUTION:
9597, 15, 20, 21, 25, 19, 4749, 18, 6571, 5431, 2503, 16, 4513, 5025, 20, 9045, 7997, 3329, 18