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.
Input: ['W', 'X', '985', 'y', '4335', '2493', 'I', '99', 'h', 'U', '8529', '757', '5665', 'g', 'o', 'N', 'b', 'a', 'B', '1915', '3483', '5071', 'F', '6857', 'Y', '7095', 'r', '3891', '4093', '5987', '8619', '2405', 'V', '9149', '8147', '5575', '405', 'C', '543', '6969']

23, 24, 985, 25, 4335, 2493, 9, 99, 8, 21, 8529, 757, 5665, 7, 15, 14, 2, 1, 2, 1915, 3483, 5071, 6, 6857, 25, 7095, 18, 3891, 4093, 5987, 8619, 2405, 22, 9149, 8147, 5575, 405, 3, 543, 6969