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: ['4427', 'd', 'S', '5793', 'P', '2073', 'b', '1291', '877', 'V', 'k', '5687', '2657', 'k']

4427, 4, 19, 5793, 16, 2073, 2, 1291, 877, 22, 11, 5687, 2657, 11