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', '503', '5885', '5181', '3151', 'X', 'K', 'Y', '4011', '6221', 'l', '4115', 'M', '735', '9379', 'A', '549']

17, 503, 5885, 5181, 3151, 24, 11, 25, 4011, 6221, 12, 4115, 13, 735, 9379, 1, 549