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: ['2907', '5773', 'n', '4381', '8375', 'H', 'r', '941', '801', '3031', 'm', 'D', '897', '5469', 'o', '8369', '3195', '4987', '7817', 'i', 'x', 'g', 'a', '9349', 'V', '1167', '3855', 'r', 'g', '6265', '185', '8761', '2579', '8495']

2907, 5773, 14, 4381, 8375, 8, 18, 941, 801, 3031, 13, 4, 897, 5469, 15, 8369, 3195, 4987, 7817, 9, 24, 7, 1, 9349, 22, 1167, 3855, 18, 7, 6265, 185, 8761, 2579, 8495