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: ['6523', 'v', '9191', 'I', '6937', 'y', '5583', '8449', '1989', '1761', '4493', '4803', 'x', 'e']

SOLUTION: 6523, 22, 9191, 9, 6937, 25, 5583, 8449, 1989, 1761, 4493, 4803, 24, 5

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

SOLUTION: 1, 4715, 24, 4649, 6995

PROBLEM: ['9459', 'd', '2621']

SOLUTION:
9459, 4, 2621