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: ['J', '2611', '9365', 'E', 'c', '6117', '6405']

SOLUTION: 10, 2611, 9365, 5, 3, 6117, 6405

PROBLEM: ['2581', 'X', '3249', '753', '5639']

SOLUTION: 2581, 24, 3249, 753, 5639

PROBLEM: ['u', 'h']

SOLUTION:
21, 8