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: ['n', 'O', 'c', 'r', '8907', 'x', '2329', 'w', 'f', '1569', 'a', 'I', 'X', '5263', 'L', 'C', '1247', 'E', 'v', '8459', 'k', 'h', 'r', 'W', '7183', '6045', 't', 'w', 'v', 'R', 'I', '9439', 'L', 't', '7775']

14, 15, 3, 18, 8907, 24, 2329, 23, 6, 1569, 1, 9, 24, 5263, 12, 3, 1247, 5, 22, 8459, 11, 8, 18, 23, 7183, 6045, 20, 23, 22, 18, 9, 9439, 12, 20, 7775