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: ['6129', 'n', '93', '4849', 'L', '6433', '4939', 'M', 'n', '223', '27', '2327', '9535', 's', 'q', 'K', 'P', '8775', '2997', '7219', 'w', 'N', 'A', '1895', 'h', '2595', '4055', '1391', 'C', 'z', '2091', '4095', '4523', 'P']

6129, 14, 93, 4849, 12, 6433, 4939, 13, 14, 223, 27, 2327, 9535, 19, 17, 11, 16, 8775, 2997, 7219, 23, 14, 1, 1895, 8, 2595, 4055, 1391, 3, 26, 2091, 4095, 4523, 16