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: ['9947', '31', '5759', 'R', 'F', 'O', 'X', 'L', '2135', '37', '1755', 'A', '2777', '1571', 'E', 'a', '1561', 'e', 'n', '2185', '9677']

9947, 31, 5759, 18, 6, 15, 24, 12, 2135, 37, 1755, 1, 2777, 1571, 5, 1, 1561, 5, 14, 2185, 9677