import java.util.*;                                                  

class SomeClass {                                                 
  public static void main(String[] args) {                           
    TreeMap<String, Integer> myMap = 
            new TreeMap<String, Integer>(); 
    myMap.put("ab", 1);  
    myMap.put("ca", 2);                       
    myMap.put("ba", 3);  
    NavigableMap<String, Integer> myMap1 = 
            myMap.headMap("da", true);
    myMap.put("ea", 4);                                            
    myMap1.put("bc", 5);                                          
    System.out.println(myMap1.get("ab") + " " + myMap1.get("ea"));
  }                                                                 
}