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: ['8537', '4959', 'G', 's', 'j', '6389', 'N', '8241', 'L', '8987', 's', '5059', '7707', '9691', '1429', 'n', '131', '7315', '6751', '8905', '8901', 'F', '7559', 'P', 'Z', '3829', 'y']

8537, 4959, 7, 19, 10, 6389, 14, 8241, 12, 8987, 19, 5059, 7707, 9691, 1429, 14, 131, 7315, 6751, 8905, 8901, 6, 7559, 16, 26, 3829, 25