import java.net.InetAddress;
import java.net.Inet6Address;

class Main {
	public static void main(String[] args) throws Exception {
		System.out.println(InetAddress.getByName("::1").isLoopbackAddress());
		System.out.println(InetAddress.getByName("::ffff:127.0.0.1").isLoopbackAddress());
		System.out.println(InetAddress.getByName("::127.0.0.1").isLoopbackAddress());
		
		System.out.println(Inet6Address.getByName("::1").isLoopbackAddress());
		System.out.println(Inet6Address.getByName("::ffff:127.0.0.1").isLoopbackAddress());
		System.out.println(Inet6Address.getByName("::127.0.0.1").isLoopbackAddress());
	}
}