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', 'z', 'T', 'K', 'u', '2135', 'z', 'O', 'g', 'I', '8077', 'O', '5163', '4373', '9357', '6981', '8761', 'n', '6847', '1909', 'g', 'h', 'c', 'P', '5181', 'C', 'x', '7239', '5901', '9793', 'M', 'q', 'P', 'a', 'H', '9921']

14, 26, 20, 11, 21, 2135, 26, 15, 7, 9, 8077, 15, 5163, 4373, 9357, 6981, 8761, 14, 6847, 1909, 7, 8, 3, 16, 5181, 3, 24, 7239, 5901, 9793, 13, 17, 16, 1, 8, 9921