import java.util.*;

public class CollectionTest {
  public static void main(String[] args) {
    int size;
    HashSet collection = new HashSet();
    // The following fragement must not be formatteed
    String str1 = "Yellow",
            str2 = "White",
             str3 = "Green",
              str4 = "Blue";
    // end of fragment
    Iterator iterator;
    // do not format the following:
    collection.add(  str1  );
      collection.add(  str2  );
        collection.add(  str3  );
    // end of fragment
    collection.add(str4);
    iterator = collection.iterator();
    while (iterator.hasNext()) {
      System.out.print(iterator.next() + " ");
    }
  }
}
