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', '2203', 'Z', '5587', 'y', 'B', 'O', 'o', '7221', 'b', '1421', '5921', '983', '6767', 'A', '9067', 'w', '2365', '4229', 'D']

5, 2203, 26, 5587, 25, 2, 15, 15, 7221, 2, 1421, 5921, 983, 6767, 1, 9067, 23, 2365, 4229, 4