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: ['8771', '61', '9981', 'U', 'u', 'H', '6659', 'x', 'R', 'Q', '1417', 'p', '6221', '4377', '1507', 'L', 'a', '3243', '4317', '695', '4513', '2819', '6599', 'h', '9601', '7393', 'C', 'O', '6015', '9925', '8693', '6875', '7509', '2103', 'e', 'e', '4707', 'R', '8665']

8771, 61, 9981, 21, 21, 8, 6659, 24, 18, 17, 1417, 16, 6221, 4377, 1507, 12, 1, 3243, 4317, 695, 4513, 2819, 6599, 8, 9601, 7393, 3, 15, 6015, 9925, 8693, 6875, 7509, 2103, 5, 5, 4707, 18, 8665