import java.util.*;

public class Main {
	public static void main (String[] args) {
		HashMap<String,String> myMap = new HashMap<String,String>();
		
		myMap.put("1", "valor1");
		myMap.put("2", "valor2");
		myMap.put("3", "valor3");
		
		myMap.put("valor1", "1");
		myMap.put("valor2", "2");
		myMap.put("valor3", "3");
		
		System.out.println(myMap.get("valor1"));
	}
}