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: ['6015', '9689', '8675', 'v', '8213', '2809', 'b', 'a', 'K', '3507', 'X', '3851', '5829', '1949', 'k', '1233', '1153', '6195', '6983', '2633']

6015, 9689, 8675, 22, 8213, 2809, 2, 1, 11, 3507, 24, 3851, 5829, 1949, 11, 1233, 1153, 6195, 6983, 2633