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: ['Q', 'M', 'V', 'm', '5007', '5029', 'z', 'X', '8815', '3239', 'Z', '6575', '4503', '6497', '153', 'p', 'S', 'x', '1421', 'N', 'C', 'F', 'x', 'Y', 'I', 'C', '8505', '3471', 'P', 'T', '3391', 'L', 'r', 'Q', '3583', 'v', 'W', 'T', '1581']

17, 13, 22, 13, 5007, 5029, 26, 24, 8815, 3239, 26, 6575, 4503, 6497, 153, 16, 19, 24, 1421, 14, 3, 6, 24, 25, 9, 3, 8505, 3471, 16, 20, 3391, 12, 18, 17, 3583, 22, 23, 20, 1581