1, 2, 4, 80, 81, 100, 800, 1000, 1001, 1002, 2000, 8001, 10001, 10002, 10003, 30001, 100001, 100002, 100003, 300001, 1000000, 1000001, 2000001, 10000001, 10000002, 40000000, 200000001, 1000000001, 1000000002, 2000000000, 8000000001, 10000000001, 10000000002