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: ['9051', 'r', '659', '1211', 'J', 'K', '8467', '767', 'Q', '4343', '9375', 'J', 'A', 'b', '2003', '9669', 'f', '5997', 'f', 'Q']

9051, 18, 659, 1211, 10, 11, 8467, 767, 17, 4343, 9375, 10, 1, 2, 2003, 9669, 6, 5997, 6, 17