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', 'i', '1967', '4905', 'K', 'u', 'r', 'n', 's', 'x', '5121', 'z', '9621', 'J', 'W', '4625', '4645', '6979', 'K', 'B', '4705', '6999', '8735', '9653', 't', '871', 'z', 'C', 'e', '1977', '1105', '2551', '9423']

17, 9, 1967, 4905, 11, 21, 18, 14, 19, 24, 5121, 26, 9621, 10, 23, 4625, 4645, 6979, 11, 2, 4705, 6999, 8735, 9653, 20, 871, 26, 3, 5, 1977, 1105, 2551, 9423