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', '1605', 's', 'T', 'D', '3511', '2365', 'Z', '947', '9175', 'B', '7279', '8883', '7339', 'o', 'x', 'y', 'M', '8459', 'a', '8317']

23, 1605, 19, 20, 4, 3511, 2365, 26, 947, 9175, 2, 7279, 8883, 7339, 15, 24, 25, 13, 8459, 1, 8317