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: ['g', '291', 'w', '9613', 'l', '2981', 'x', 'q', 'H', '2405', '3773', 'Y', '5065', 'b', 'u', '2607', '2807', 'J', '5355', '3731', 'N', 's', '7393']

7, 291, 23, 9613, 12, 2981, 24, 17, 8, 2405, 3773, 25, 5065, 2, 21, 2607, 2807, 10, 5355, 3731, 14, 19, 7393