digraph {
concentrate=true;overlap=scale;"rat=Qarallax" [label="rat\nQarallax",shape=box,style=filled,color=deepskyblue];"rat=Qarallax" -> "tool=qrat" [label="similar",dir="both"];"tool=qrat" [label="tool\nqrat",shape=box,style=filled,color=deepskyblue];}