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', '6883', '5395', 'C', '9779', '2919', '8663', 'e', '8309', 'M', '6981', '1027', '5683', '3295', '3217', 'W', '9067', 'm', 'x', '1429', 'Y', '1233', '8731', 'Z', '5599', '5699', 'G', '9381', 'x', 'L', '7047', 'j', '9131', '9265', 'L', '1729', '6689', '3849']

23, 6883, 5395, 3, 9779, 2919, 8663, 5, 8309, 13, 6981, 1027, 5683, 3295, 3217, 23, 9067, 13, 24, 1429, 25, 1233, 8731, 26, 5599, 5699, 7, 9381, 24, 12, 7047, 10, 9131, 9265, 12, 1729, 6689, 3849