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: ['6755', 'i', '5769', 'N', 'c', 'H', 'G', '3351', 'D', '4795', 'Z', 'P', 'e', 'I', 'c', '4881', 'k', 'D', '959', 'V', '5135', '9245', 'y', '7829', '5343', 'a', 'T']

6755, 9, 5769, 14, 3, 8, 7, 3351, 4, 4795, 26, 16, 5, 9, 3, 4881, 11, 4, 959, 22, 5135, 9245, 25, 7829, 5343, 1, 20