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: ['J', '7483', 'k', 'v', '9617', 'S', 'a', '1865', '9343', '6847', '1813', 'P', 'n', '9101', '1605', 'G', 's']

10, 7483, 11, 22, 9617, 19, 1, 1865, 9343, 6847, 1813, 16, 14, 9101, 1605, 7, 19