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: ['8809', 'n', '2599', 'u', 'V', '6003', 'W', 'r', 'N', 'b', 'v', 'P', '9389', 'u', '8149', 'q', 'O', 'r', '7701', '413']

8809, 14, 2599, 21, 22, 6003, 23, 18, 14, 2, 22, 16, 9389, 21, 8149, 17, 15, 18, 7701, 413