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: ['U', 'h', 'b', 'Q', '3567', 't', '8323', '7335', 'U', '4237', 'S', '7701', 'V', 'D', 'I', '1133', 'F', '6593', 'h', 'F', '7351', '4121', '2599', 'r', '1419', 'V', 'H', '1335', '7747', 'o', '1297', '3375', '6377', 'l']

21, 8, 2, 17, 3567, 20, 8323, 7335, 21, 4237, 19, 7701, 22, 4, 9, 1133, 6, 6593, 8, 6, 7351, 4121, 2599, 18, 1419, 22, 8, 1335, 7747, 15, 1297, 3375, 6377, 12