import java.util.*;

class Basic {
  public static void main(String[] args) {
    Map<String, String> d;
    d = new HashMap<String, String>();
    System.out.println( d );
    d.put("dgerman", "s0mething");
    d.put("ma36", "t!mmy");
    d.put("dgerman", "n0thing");
    System.out.println( d );
    for (String key : d.keySet()) {
      System.out.println( key + " --> " + d.get(key) );
    }
  }
}