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.

['2973', 'a', '6251', 's', '5009', 'm', 'G']
2973, 1, 6251, 19, 5009, 13, 7

['f', '9797', 'E']
6, 9797, 5

['i', 'd', 'a', 'f', 'y']

9, 4, 1, 6, 25