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', 'H', '2827', 'Y', '2563', 'n', 'H', 'f', 'r', 'l', '6383', '9513', '1641', 'b', 'w', 'f', 'I', '1181', 'X']

16, 8, 2827, 25, 2563, 14, 8, 6, 18, 12, 6383, 9513, 1641, 2, 23, 6, 9, 1181, 24