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: ['2659', 't', '5207', 'i', '2567', '7167', 'Y', 'G', 'd', '2569', 'L', 'h', 'X', 'O', 'g', '6897']

2659, 20, 5207, 9, 2567, 7167, 25, 7, 4, 2569, 12, 8, 24, 15, 7, 6897