import java.net.*;

class app {
    public static void main (String args[]) throws UnknownHostException {
        InetAddress Address = InetAddress.getLocalHost();
        System.out.println(Address);
        Address = InetAddress.getByName("codeforces.ru");
        System.out.println(Address);
        InetAddress SW[] = InetAddress.getAllByName("vk.com");
        for (int i = 0; i < SW.length; ++i) System.out.println(SW[i]);
    }
}