digraph {
concentrate=true;overlap=scale;"rat=NetDevil" [label="rat\nNetDevil",shape=box,style=filled,color=deepskyblue];"rat=NetDevil" -> "rat=Net Devil" [label="similar",dir="both"];"rat=Net Devil" [label="rat\nNet Devil",shape=box,style=filled,color=deepskyblue];}