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', 'P', '4227', 'u', 'B', 'V', '5697', 'G', '7349', '5595', '3649', '8755']

23, 16, 4227, 21, 2, 22, 5697, 7, 7349, 5595, 3649, 8755