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: ['q', '4857', 'y', '1237', '6297', '8683', '7977', 'r', '5015', 'd', 'G', '2579', '9571']

17, 4857, 25, 1237, 6297, 8683, 7977, 18, 5015, 4, 7, 2579, 9571