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: ['r', 'G', '8025', '4787', '4699', '4479', 'n', 'B', 'm', 'm', '3519', '8401', 'W', 'n', 'a', '9785', 'h', 'i', '6211', '3885', '3351', 'S', 'Q', 'M', '1743', 'X']

18, 7, 8025, 4787, 4699, 4479, 14, 2, 13, 13, 3519, 8401, 23, 14, 1, 9785, 8, 9, 6211, 3885, 3351, 19, 17, 13, 1743, 24