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: ['A', '2567', 'h', '9633', 'h', '2613', '2885', '8639', 'x', 'P', 'L', 'g', '7583', 'f', 'n', 'M', '6829', '5769', '8335']

1, 2567, 8, 9633, 8, 2613, 2885, 8639, 24, 16, 12, 7, 7583, 6, 14, 13, 6829, 5769, 8335