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: ['9381', 'f', '9595', 'U', '4857', '5865', '8259', 'Y', 'g']

SOLUTION: 9381, 6, 9595, 21, 4857, 5865, 8259, 25, 7

PROBLEM: ['c', 'W', '9815', 'X', 'q', '8309', '7153', 'G', '7877', '6843', 'E', '7631', '4251', '9299', 'y']

SOLUTION: 3, 23, 9815, 24, 17, 8309, 7153, 7, 7877, 6843, 5, 7631, 4251, 9299, 25

PROBLEM: ['4793', 'v', 'u', 'L', 'B', 'M', '5891', '5657', '1407', '6869', 'r', '6185', '1019', '4743', '2271', 'q', '9867', '2291', 'Y', '9505', 'S', '7295', '6741', '6253', '7821', 'O', '361', 's', 'I', 'k', '6497', 'd', 'Q', '989', 'a', '8903']

SOLUTION:
4793, 22, 21, 12, 2, 13, 5891, 5657, 1407, 6869, 18, 6185, 1019, 4743, 2271, 17, 9867, 2291, 25, 9505, 19, 7295, 6741, 6253, 7821, 15, 361, 19, 9, 11, 6497, 4, 17, 989, 1, 8903