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: ['i', 'W', 'h', '9029', '799', '8621', '1439', 'L', '8033', 'p', 'r', '1891', 'e', '1471', '7653', 'l', '6837', 'E', '189', '8815', '5439', '7875', '2741', '4849', 't', '2689', '7107', '959', '8289', '3927', 'r', '8347', 'U', '8263', 'A', 'i', 'p', 'S', '7893', 'x']

9, 23, 8, 9029, 799, 8621, 1439, 12, 8033, 16, 18, 1891, 5, 1471, 7653, 12, 6837, 5, 189, 8815, 5439, 7875, 2741, 4849, 20, 2689, 7107, 959, 8289, 3927, 18, 8347, 21, 8263, 1, 9, 16, 19, 7893, 24