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: ['d', 'z', 'P', 't', '9363', 'E', '2423', '6211', '9633', 'U', '3209', 'i', 'f', '3405', '149', '2349', 'Z', 'F', '9691', '3503', '9339', 'w', 'e', 'f', 'h', '2459', '7875', '4157', 'n', 'm', '3733', '1959', '1831', 'W', 'n']

4, 26, 16, 20, 9363, 5, 2423, 6211, 9633, 21, 3209, 9, 6, 3405, 149, 2349, 26, 6, 9691, 3503, 9339, 23, 5, 6, 8, 2459, 7875, 4157, 14, 13, 3733, 1959, 1831, 23, 14