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', '4553', '3681', 'n', '9293', '1717', 'U', '8053', '653', '563', 'P', 'H', '3815', 'd', 'y', '3823', 'O', '3603', 'X', '8497', '3489', 'X', '9279', 'O', 'A', 'e', 'p', '9907', '4067', 'T', '3657', 'd', '6647', 'a', 'U', '2533', '5901']

23, 4553, 3681, 14, 9293, 1717, 21, 8053, 653, 563, 16, 8, 3815, 4, 25, 3823, 15, 3603, 24, 8497, 3489, 24, 9279, 15, 1, 5, 16, 9907, 4067, 20, 3657, 4, 6647, 1, 21, 2533, 5901