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: ['X', 'J', 'H', '6191', 'k', '3997', 'x', 'h', 'Q', '1755', '589', '5101', '7659', '3499', 'G']

24, 10, 8, 6191, 11, 3997, 24, 8, 17, 1755, 589, 5101, 7659, 3499, 7