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: ['W', 'y', 'J', '4887', '8015', 't', '7295', '8459', '761', 'J', 'L', 'q', 'i', 'g', '8825', 'l', 'J', 'Y', '9059', 'e', '4283', 'O', 'u']

23, 25, 10, 4887, 8015, 20, 7295, 8459, 761, 10, 12, 17, 9, 7, 8825, 12, 10, 25, 9059, 5, 4283, 15, 21