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: ['9329', 'n', '7293', '851', 'x', '7139', '1653', 'u', '4349', 'd', 'o', '5595', '4523', '97', 'z', '7549', 'K', '6645', '9799', '99']

9329, 14, 7293, 851, 24, 7139, 1653, 21, 4349, 4, 15, 5595, 4523, 97, 26, 7549, 11, 6645, 9799, 99