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: ['p', 'O', '4747', 'j', '2995', '6103', '1563', 'G', '9683', '4413', 'Y', 'L', 'I', 'l', 'E', '3969', 'b', 'j', 'y', 'y', 'A', 'M', 'T', '1565', '5765', 'D', 'K', 'O']

16, 15, 4747, 10, 2995, 6103, 1563, 7, 9683, 4413, 25, 12, 9, 12, 5, 3969, 2, 10, 25, 25, 1, 13, 20, 1565, 5765, 4, 11, 15