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: ['f', 'X', 'B', '6547', '5747', '2009', 'j', '7293', 'V', 'o', '5031', 'J', '6251', 'P', '2831', 'k', 'Y', 'c', '5167', 'l', 'E', '3797', '367', '5957', '2071', '7167', 'e', 'R', '7125', '7359', '9775']

6, 24, 2, 6547, 5747, 2009, 10, 7293, 22, 15, 5031, 10, 6251, 16, 2831, 11, 25, 3, 5167, 12, 5, 3797, 367, 5957, 2071, 7167, 5, 18, 7125, 7359, 9775