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: ['4049', '4931', '6643', '5399', '6941', '1425', 'q', '6931', '4721', '9643', 'X', 'a', '7233', 'I', '657', '163', 'i', 'L', '2649', 'f', 'b', '9159']

4049, 4931, 6643, 5399, 6941, 1425, 17, 6931, 4721, 9643, 24, 1, 7233, 9, 657, 163, 9, 12, 2649, 6, 2, 9159