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', '8821', 'U', 'X', 'N', '4125', 's', 'C', '9141']

SOLUTION: 14, 8821, 21, 24, 14, 4125, 19, 3, 9141

PROBLEM: ['1801', '667', 'e', 'U', 't', '6309', '5535', 'g', '3007', 'g', 'y', '7329', '3741', 'f', 'O', 'i', 'T', 'p', '685', 'u', 'q', '8561', 'Z']

SOLUTION: 1801, 667, 5, 21, 20, 6309, 5535, 7, 3007, 7, 25, 7329, 3741, 6, 15, 9, 20, 16, 685, 21, 17, 8561, 26

PROBLEM: ['x', '4435', '9457', '8551', 'k', 's', '2725', 'G', '8061', 'i', 'E', '5599', 'G', '4895', '2599', '6533', 'n', 'f', 'B', 'e', 'u', 's', 'a']

SOLUTION:
24, 4435, 9457, 8551, 11, 19, 2725, 7, 8061, 9, 5, 5599, 7, 4895, 2599, 6533, 14, 6, 2, 5, 21, 19, 1