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', 'i', 'y', 'z', 'c', '8653', '9427', 's', 'o', 'O', '8293', '6735', 'X']

17, 9, 25, 26, 3, 8653, 9427, 19, 15, 15, 8293, 6735, 24