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: ['1207', 'B', '4273', '7081', '6009', '3933', '5589', '1543', '2631']

SOLUTION: 1207, 2, 4273, 7081, 6009, 3933, 5589, 1543, 2631

PROBLEM: ['N', '4731', '2087', 't', 'g']

SOLUTION: 14, 4731, 2087, 20, 7

PROBLEM: ['Q', '8921', '7131', '9247', '3351', '4689', 'L', 'O', 'N', 'g', 'Q', '413']

SOLUTION:
17, 8921, 7131, 9247, 3351, 4689, 12, 15, 14, 7, 17, 413