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: ['8527', 'e', 'I', '8023', 'O', '7279', '4781', 'M', 'A', '1373', 'K', 'm']

8527, 5, 9, 8023, 15, 7279, 4781, 13, 1, 1373, 11, 13