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: ['T', '8537', 'i', 'X', '9663', '8793', 'l', 'l', '9821', '2479', 'V', '4995', '9599', 'L', '5959', 's', 'k', 'T', 'j', 'x', '8491', 'M', '931', '1669', 'S', '4429', '6605', '5629']

20, 8537, 9, 24, 9663, 8793, 12, 12, 9821, 2479, 22, 4995, 9599, 12, 5959, 19, 11, 20, 10, 24, 8491, 13, 931, 1669, 19, 4429, 6605, 5629