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: ['6101', 'Y', '9353', 'x', '97', 'x', '7533', 'w', 'J', 'q', '1441', 'z', '4869', '1299', 'Y', '5545', 'g', 'e', '6769', 'h', 'S']

6101, 25, 9353, 24, 97, 24, 7533, 23, 10, 17, 1441, 26, 4869, 1299, 25, 5545, 7, 5, 6769, 8, 19