assertEquals( 2, x.size() );
assertTrue( x.contains( "A" ) );
assertTrue( x.contains( "Z" ) );
x = encoder.immediateParents( encoder.jointMembersCode( Arrays.asList( "B", "C" ) ) );
System.out.println( "LCS " + x );
assertEquals( 2, x.size() );
assertTrue( x.contains( "A" ) );
assertTrue( x.contains( "Z" ) );