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', '4435', '9457', '8551', 'k', 's', '2725', 'G', '8061', 'i', 'E', '5599', 'G', '4895', '2599', '6533', 'n', 'f', 'B', 'e', 'u', 's', 'a']

24, 4435, 9457, 8551, 11, 19, 2725, 7, 8061, 9, 5, 5599, 7, 4895, 2599, 6533, 14, 6, 2, 5, 21, 19, 1