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: ['c', '4751', '23', 'H', 'N', '9031', '161', 'J', '3107', '4625', '3109', 'N', '3629', '2793', '7731', '6059', '5307', 'B', 'n', 'P', '2903', 'l', '7001', 'O', '8939', 'Q', 'w', '7027', 'n', 'r', 'f', 'U', 'z', '5255', 'Z', '961', '7215', '6117', 'S', '8543']

3, 4751, 23, 8, 14, 9031, 161, 10, 3107, 4625, 3109, 14, 3629, 2793, 7731, 6059, 5307, 2, 14, 16, 2903, 12, 7001, 15, 8939, 17, 23, 7027, 14, 18, 6, 21, 26, 5255, 26, 961, 7215, 6117, 19, 8543