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: ['E', 'p', 'H', '9469', '3003', '8449', 'W', 'w', 'M', '2365', '9241', 'L', 'U', 'h', '3359', 't', 'C', '9337', 'x', 'w', 'j', '4787', '4545', 'F']

5, 16, 8, 9469, 3003, 8449, 23, 23, 13, 2365, 9241, 12, 21, 8, 3359, 20, 3, 9337, 24, 23, 10, 4787, 4545, 6