echo 'digraph {

"Raichu" -> "Pikachu" [taillabel = "Evolves into"]
"Pichu" -> "Pikachu" [taillabel = "Evolves from"]
"Pikachu" -> "Raichu" [taillabel = "Evolves from"]
"Pikachu" -> "Pichu" [taillabel = "Evolves into"]
}' | dot -Tsvg > output.svg