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: ['9747', '8437', 'C', '3797', '7225', '6775', 'v', '9959', '833', 'e', '2793', '9909', '4947', 'w', '3819', '7535', '5403', '8557', 'H', 'z', '6201', 'G', '6415', '3615', '6889', 'e']

9747, 8437, 3, 3797, 7225, 6775, 22, 9959, 833, 5, 2793, 9909, 4947, 23, 3819, 7535, 5403, 8557, 8, 26, 6201, 7, 6415, 3615, 6889, 5