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: ['A', 'M', '4265', 'P', 'e', 'W', 'I', '7481', 'a', 'L', 'w', '2891', '347', '6469', 'T', 'I', '7517', '9357', 'v', 'd', 'N', 'S', 'G', '4715', '235', '359']

SOLUTION: 1, 13, 4265, 16, 5, 23, 9, 7481, 1, 12, 23, 2891, 347, 6469, 20, 9, 7517, 9357, 22, 4, 14, 19, 7, 4715, 235, 359

PROBLEM: ['u', 'a', '9939', '9353', 'v', 'S', 'l', '981', 'P', 'q', 'M', 'w', '8419']

SOLUTION: 21, 1, 9939, 9353, 22, 19, 12, 981, 16, 17, 13, 23, 8419

PROBLEM: ['1291', '4441', 'T', '571', 'n', 'f', 'W', 'L', '833', 'S']

SOLUTION:
1291, 4441, 20, 571, 14, 6, 23, 12, 833, 19