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: ['4961', '4503', 'G', '7489', 'y', '2869', '7535', '5981', 'O', '4559', 'N', '9539', 'v', '279', 'N', 'q', 'i', 'd', '8285', '4265', 'W', '7971', '5999', '7657', 'q', '8453', '3677', '3733', 'X', 'U', '8745', '5117', '9695', '3445', 'p', '2091']

4961, 4503, 7, 7489, 25, 2869, 7535, 5981, 15, 4559, 14, 9539, 22, 279, 14, 17, 9, 4, 8285, 4265, 23, 7971, 5999, 7657, 17, 8453, 3677, 3733, 24, 21, 8745, 5117, 9695, 3445, 16, 2091