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: ['B', '2285', '9217', 'H', 'J', '2141', 'i', 'S', 'r', 'W', 'K', '7353', '63', '9127', '5071', 'x', '3057', '1565']

2, 2285, 9217, 8, 10, 2141, 9, 19, 18, 23, 11, 7353, 63, 9127, 5071, 24, 3057, 1565