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: ['4047', '4601', 'J', 'a', 'i', 'H', 'S', '23', 'U', '2139', '9023', '5921', '9939', '8813', '9151', '3711', '1523', 'n', '1793', 'b', '3321', '8959', 'p', 'G', 'Y', 's', '6093', '8383', '2601', '1059', 'm', '8055', 'U', '3321']

4047, 4601, 10, 1, 9, 8, 19, 23, 21, 2139, 9023, 5921, 9939, 8813, 9151, 3711, 1523, 14, 1793, 2, 3321, 8959, 16, 7, 25, 19, 6093, 8383, 2601, 1059, 13, 8055, 21, 3321