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: ['Y', 'm', 'C', 'q', '9837', '2277', '357', 'R', 'o', 'Y', 'A', '8985', '2311', 'I', 'a', 'p']

25, 13, 3, 17, 9837, 2277, 357, 18, 15, 25, 1, 8985, 2311, 9, 1, 16