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: ['h', '3329', '989', 'W', '7587', 'b', 'w', 'L', '1459', 'n', 'O', '5587', '1799']

8, 3329, 989, 23, 7587, 2, 23, 12, 1459, 14, 15, 5587, 1799