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: ['4809', '1779', 'V', '6907', '19', 'p', '6957', '9935', 'P', 'K', '8645', '9853', '7089', '1169', '61', 's', 'D', 'y']

4809, 1779, 22, 6907, 19, 16, 6957, 9935, 16, 11, 8645, 9853, 7089, 1169, 61, 19, 4, 25