mkdir animal/vertebrate/mammal/mythical
mkdir animal/vertebrate/mammal/rodent
mkdir animal/vertebrate/mammal/ruminant
+touch animal/vertebrate/mammal/platypus
+touch animal/vertebrate/mammal/walrus
touch animal/vertebrate/mammal/bear/grizzly
touch animal/vertebrate/mammal/mythical/mermaid
touch animal/vertebrate/mammal/mythical/unicorn