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: ['q', 'l', '6869', '7033', '8007', '175', 't', '293', '1661', '4257', '2111', 'A', 'T', '9371', '9777', 'l', 'I', 'c', 'm', '549', '1753', 'A']

17, 12, 6869, 7033, 8007, 175, 20, 293, 1661, 4257, 2111, 1, 20, 9371, 9777, 12, 9, 3, 13, 549, 1753, 1