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: ['4677', 'V', 'p', 'w', 'H', 'b', '7337', '5763', 'O', 'J', 'M', 'n', 'j', 'k', '9591', 'H', '3117', '4675', 'u', '7523', '2755']

4677, 22, 16, 23, 8, 2, 7337, 5763, 15, 10, 13, 14, 10, 11, 9591, 8, 3117, 4675, 21, 7523, 2755