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: ['307', '5337', 'X', 'I', 'k', '4965', '4677', '5661', 'j', '2561', '9875', '3585', 'E', '6193', '4825', '4371', '1625', '2817', 'M', 'b', 'n', '4253', '9847', 'O', '1045', 'a', 'S', '5231', '2519', '3213', 'Q']

307, 5337, 24, 9, 11, 4965, 4677, 5661, 10, 2561, 9875, 3585, 5, 6193, 4825, 4371, 1625, 2817, 13, 2, 14, 4253, 9847, 15, 1045, 1, 19, 5231, 2519, 3213, 17