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', '4259', '7203', '3303', '4303', 'i', '2197', '9863', '7805', 'I', '8359', '3255', '9311', 's', 'l', 'R', 'S', 'w', '4223', '2277', '5479', 'D', '2289', 'y', '3811', 'O', 'Q', 'u', '2307', '8047', '4787', 'n', '8017', '6777', 'a']

25, 4259, 7203, 3303, 4303, 9, 2197, 9863, 7805, 9, 8359, 3255, 9311, 19, 12, 18, 19, 23, 4223, 2277, 5479, 4, 2289, 25, 3811, 15, 17, 21, 2307, 8047, 4787, 14, 8017, 6777, 1