import java.util.Vector;
public class X{
	Vector<Integer> vector;
	public X(){
		vector = new Vector <Integer>();
	}
	public void Add(int number){
		vector.add(number);
	}
	public String toString(){
		String result ="";
		for(Integer i: vector){
			result+=i +" ";
		}
		return result;
	}
}


import java.util.Vector;
public class X{
	Vector<Integer> vector;
	public X(){
		vector = new Vector <Integer>();
	}
	public String toString(){
		String result ="";
		for(Integer i: vector){
			result+=i +" ";
		}
		return result;
	}
	public static void Add(X x, int number){
		x.vector.add(number);
	}
}