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: ['y', 'n', 'o', 'w', 'z', 'X', 'J', '8191', '5085', '8571', '6845', 'c', 'E', '2603', 'K', 'O', '8247']

25, 14, 15, 23, 26, 24, 10, 8191, 5085, 8571, 6845, 3, 5, 2603, 11, 15, 8247