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: ['9409', '5955', '9349', '8275', '3975', 'c', 'v', 'L', '1561', 'f', 'p']

9409, 5955, 9349, 8275, 3975, 3, 22, 12, 1561, 6, 16