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: ['X', '1041', 'X', 'e', 'I', 'i', '6793', '3561', 'A', '6035', 'B', 'O', '759', 't', '2733', '3859', 'l', '3167', 'R', 'S', '7047', '319', 'b', 'v', 'O', 'O', 'a']

24, 1041, 24, 5, 9, 9, 6793, 3561, 1, 6035, 2, 15, 759, 20, 2733, 3859, 12, 3167, 18, 19, 7047, 319, 2, 22, 15, 15, 1