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: ['2741', 'N', 'X', 'L', '6481', '9087', '9819', '3403', '8825', '2757', 'c', '5731', '2203', 'W', 'H', 's', '1743', 't', '4619', '8881', '5297', 'L', '9003', 'Z', '463', 's']

2741, 14, 24, 12, 6481, 9087, 9819, 3403, 8825, 2757, 3, 5731, 2203, 23, 8, 19, 1743, 20, 4619, 8881, 5297, 12, 9003, 26, 463, 19