assertTrue( x.contains( "N" ) );
assertTrue( x.contains( "T" ) );
System.out.println(" +*******************************+ ");
x = encoder.lowerDescendants(new BitSet());
System.out.println( "DESC " + x );
assertEquals( 13, x.size() );
assertTrue( x.contains( "Z" ) );
assertTrue( x.contains( "Thing" ) );