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: ['4827', '5477', '3425', '1821', 'H', 't', '8699', 'W', '281', '1397', '8863', 'C', 'L', '7001', 'u', '593', 's', '2745', 'v', 'X', 'i', '5947']

4827, 5477, 3425, 1821, 8, 20, 8699, 23, 281, 1397, 8863, 3, 12, 7001, 21, 593, 19, 2745, 22, 24, 9, 5947