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: ['q', 'B', 'U', '9387']

SOLUTION: 17, 2, 21, 9387

PROBLEM: ['a', '4715', 'X', '4649', '6995']

SOLUTION: 1, 4715, 24, 4649, 6995

PROBLEM: ['n', 'v', '763', '6945', 'g', 'k', 'b', 'M', 'F', 'q', '5399', 'g']

SOLUTION:
14, 22, 763, 6945, 7, 11, 2, 13, 6, 17, 5399, 7

