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: ['s', 'd', '3563', '9159', 'X', 'm', '8195', 'I', '8103', '1497', '409', 'c', 'J', '6045', '7689', 'l', '2495', 'j', 'n', 'A', 'i', '4215']

19, 4, 3563, 9159, 24, 13, 8195, 9, 8103, 1497, 409, 3, 10, 6045, 7689, 12, 2495, 10, 14, 1, 9, 4215