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', '1313', 'D', '7141', 'M', '9541', '7713', '8179', 't', '4881', 'J', '9091', 'c', '8283', '7749', 'Z', '109', 'x', 'd', '89', '4757', '4399', '1615', '9735']

23, 1313, 4, 7141, 13, 9541, 7713, 8179, 20, 4881, 10, 9091, 3, 8283, 7749, 26, 109, 24, 4, 89, 4757, 4399, 1615, 9735