public SimpleDictionary(String... aWords){
  words=new HashSet<String>();
  for (  String word : aWords) {
    words.add(word.toLowerCase());
  }
}

public SimpleDictionary ( String ... aWords ) { words = new HashSet < String > ( ) ; for ( String word : aWords ) { words . add ( word . toLowerCase ( ) ) ; } }
create a simple dictionary from a list of string . this can be used for testing
