Pokémon type graph

Pokémon has different advantageous attacks depending on type. I gave it a graph.

I made this by DOT.

digraph{
Fire->Bug;
Fire->Steel;
Fire->Grass;
Fire->Ice;

Water->Ground;
Water->Rock;
Water->Fire;

Electric->Flying;
Electric->Water;

Grass->Ground;
Grass->Rock;
Grass->Water;

Ice->Ground;
Ice->Flying;
Ice->Grass;
Ice->Dragon;

Fighting->Normal;
Fighting->Rock;
Fighting->Steel;
Fighting->Ice;
Fighting->Dark;

Poison->Grass;
Poison->Fairy;

Ground->Poison;
Ground->Rock;
Ground->Steel;
Ground->Fire;
Ground->Electric;

Flying->Fighting;
Flying->Bug;
Flying->Grass;

Psychic->Fighting;
Psychic->Poison;

Bug->Grass;
Bug->Psychic;
Bug->Dark;

Rock->Flying;
Rock->Bug;
Rock->Fire;
Rock->Ice;

Ghost->Ghost;
Ghost->Psychic;

Dragon->Dragon;

Dark->Ghost;
Dark->Psychic;

Steel->Rock;
Steel->Ice;
Steel->Fairy;

Fairy->Fighting;
Fairy->Dragon;
Fairy->Dark;
}