digraph G {
 "rel-" ;
 "key-" ;
 "tak-" ;
 "mkk4hep-" ;
 edge [dir=back] "key-" -> "rel-" ;
 edge [dir=back] "rel-" -> "key-" ;
 edge [dir=back] "rel-" -> "tak-" ;
 edge [dir=back] "key-" -> "tak-" ;
 edge [dir=back] "mkk4hep-" -> "tak-" ;
}
