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: ['1333', '237', 'A', 'N', 'B', 'v', '8221', 'h', '3747', '9775', 'C', '3995', 'J', '5131', 'R', 'n', '3671', 'M', '8123', 'N', '2153', 'I', 'g', '7443', '3591', '5607', 'Y', 'F', '6135', '6523', '5543']

1333, 237, 1, 14, 2, 22, 8221, 8, 3747, 9775, 3, 3995, 10, 5131, 18, 14, 3671, 13, 8123, 14, 2153, 9, 7, 7443, 3591, 5607, 25, 6, 6135, 6523, 5543