import java.util.Enumeration;
import java.util.Hashtable;
public class Main {
public static void main(String args[]) {
Hashtable hash = new Hashtable();
hash.put("1","one");
hash.put("2","two");
hash.put("3","three");
Enumeration keys = hash.keys();
while (keys.hasMoreElements()) {
Object key = keys.nextElement();
Object value = hash.get(key);
System.out.println(key+" : "+value);
}
}
}