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: ['y', '1537', 'J', 'K', 'T', '7891', 'S', '1845', 'U', 'D', 'b', 'S', '6867', '1413', '9425', '3953', '4061', '9031', 'z', '3367', 'b', 'r', 't', '8575', 'e', '503', '6911', 'n', 'j', '9441', 'r', '7391', '1075', '4893']

25, 1537, 10, 11, 20, 7891, 19, 1845, 21, 4, 2, 19, 6867, 1413, 9425, 3953, 4061, 9031, 26, 3367, 2, 18, 20, 8575, 5, 503, 6911, 14, 10, 9441, 18, 7391, 1075, 4893