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: ['h', '3791', '1859', 'j', 'S', '7827', '9859', 's', '1569', '3981', 'u', 'b', '4049', '5879', '3671', 'c', '7799', '6773', 'Y', '8013', 'I', '2153', 'N', '1659', 'c', '8561', '2337', 'x', 'F', 'B', '747', 'l', 'U', '4881', '7563', 'Q']

8, 3791, 1859, 10, 19, 7827, 9859, 19, 1569, 3981, 21, 2, 4049, 5879, 3671, 3, 7799, 6773, 25, 8013, 9, 2153, 14, 1659, 3, 8561, 2337, 24, 6, 2, 747, 12, 21, 4881, 7563, 17