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: ['9391', '5923', '7195', 'd', '5763', '4437', 'f', '2885', '153', 'I', 'w', 'v', 's', '3381', '2931', 'l', 'P', '2435', '7365', 'I', 'G', '4217', '8047', '6035', '865', 'h', '6273', 'y', 'b', 'X', 'e', '321', 'H']

SOLUTION: 9391, 5923, 7195, 4, 5763, 4437, 6, 2885, 153, 9, 23, 22, 19, 3381, 2931, 12, 16, 2435, 7365, 9, 7, 4217, 8047, 6035, 865, 8, 6273, 25, 2, 24, 5, 321, 8

PROBLEM: ['9007', '1763', '6967', '4893', 'Z', '993', 'M', '8521', 'I', 'Z', '735', 'L', 'M', '1811', 'n', 'S', 'U', 'S', '4891', '3915']

SOLUTION: 9007, 1763, 6967, 4893, 26, 993, 13, 8521, 9, 26, 735, 12, 13, 1811, 14, 19, 21, 19, 4891, 3915

PROBLEM: ['O', '1397', '4105', '9265', 'd', '2327', 'J', '3937', 'b', '9315', 'L', 'n', '2361', 'F', 'y', 'z', 'C', 'm', '903', 'y', '4797', '2377', '6109', '6921', 'f']

SOLUTION:
15, 1397, 4105, 9265, 4, 2327, 10, 3937, 2, 9315, 12, 14, 2361, 6, 25, 26, 3, 13, 903, 25, 4797, 2377, 6109, 6921, 6