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: ['q', '1141', 'z', '9135', 'e', '425', 'S', 'p', '2959', '5539', '4751', '8053', 'j', '8315']

17, 1141, 26, 9135, 5, 425, 19, 16, 2959, 5539, 4751, 8053, 10, 8315