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: ['F', 'x', '8401', '3489', '3259', '7029', '3565', 'a']

SOLUTION: 6, 24, 8401, 3489, 3259, 7029, 3565, 1

PROBLEM: ['5473', '3897', 'E', '7551', 'U', 'l', 'C', 'p', 'w', 'g']

SOLUTION: 5473, 3897, 5, 7551, 21, 12, 3, 16, 23, 7

PROBLEM: ['o', '4769', 'J', '8717', 'E', '7265', 'W', 'X', '6751', 'v', '5429', 'T', 's', '5497', '6323', 'M', '1719', 'G', '2655', 'T', 'X', 'Q', 'Z', '8513', 'W', 'c', 'S']

SOLUTION:
15, 4769, 10, 8717, 5, 7265, 23, 24, 6751, 22, 5429, 20, 19, 5497, 6323, 13, 1719, 7, 2655, 20, 24, 17, 26, 8513, 23, 3, 19