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', 'E', '7467', '5643', '9441', '1953', '7541', 'd', 'X', '5259', 'b', '5193']

23, 5, 7467, 5643, 9441, 1953, 7541, 4, 24, 5259, 2, 5193