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: ['x', 'Q', '5711', '5661', '7399', 'l', '8015', '9825', 'c', 'e']

24, 17, 5711, 5661, 7399, 12, 8015, 9825, 3, 5