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: ['7463', 'x', 'w', 'y', '3185', '4319', 'C', 'X', '3279', 'S', 'z', 'e', '3423', '4775', '4381', 'U', '477', 'K', '5501', '2059', '9307', '8603', '3199', 'r', '8801', 'b', '7387']

SOLUTION: 7463, 24, 23, 25, 3185, 4319, 3, 24, 3279, 19, 26, 5, 3423, 4775, 4381, 21, 477, 11, 5501, 2059, 9307, 8603, 3199, 18, 8801, 2, 7387

PROBLEM: ['5445', '5961', 'Y', 'E', '8771', '6475', 'P', '5947', '4139']

SOLUTION: 5445, 5961, 25, 5, 8771, 6475, 16, 5947, 4139

PROBLEM: ['3277', 'B', '5573', 'Z', 'E', '4831']

SOLUTION:
3277, 2, 5573, 26, 5, 4831