import java.util.*;
public class Queue1 {
    public  static void main(String ... args){
        Queue<String> antrian = new LinkedList<String>();
        antrian.add("John");
        antrian.add("Nila");
        antrian.add("Wulan");

        System.out.println(antrian.peek());
        System.out.println(antrian.poll());
        System.out.println(antrian);
    }
}