digraph Syzygy {
  KBBNNvK -> KBNNvK;
  KBBNNvK -> KBBNvK;
  KBBNvK -> KBNvK;
  KBBNvK -> KBBvK;
  KBBvK -> KBvK;
  KBNvK -> KNvK;
  KBNvK -> KBvK;
  KBNNvK -> KNNvK;
  KBNNvK -> KBNvK;
  KNNvK -> KNvK;
}