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: ['3721', '3883', 'Y', 'a', '9731', 'z', '5379', 'N', 'y', 'l', '9811', 'V', 'h', '9587', 'd', '6637', '701']

3721, 3883, 25, 1, 9731, 26, 5379, 14, 25, 12, 9811, 22, 8, 9587, 4, 6637, 701