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: ['S', '8113', '9143', '4801', 'a', '1841', '6543', 'g', '6827', 'N', '3337', '6765', '2717', '6075', '5511', 's', 'D', '1753', 'U', 'X', '7381', 's', 'Q', '1201', 'B', '8669', 'j', '25', '6609']

19, 8113, 9143, 4801, 1, 1841, 6543, 7, 6827, 14, 3337, 6765, 2717, 6075, 5511, 19, 4, 1753, 21, 24, 7381, 19, 17, 1201, 2, 8669, 10, 25, 6609