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: ['9137', 'J', 'm', 'A', '8951', '1447', 'C', '913', 'E', 'B', '8863', '7807', '8771', 'n', 'n', '3363', '2727', 'b', '3977', '689', 'p', '7267', '9983', 'S', '2935']

9137, 10, 13, 1, 8951, 1447, 3, 913, 5, 2, 8863, 7807, 8771, 14, 14, 3363, 2727, 2, 3977, 689, 16, 7267, 9983, 19, 2935