Input (grade 13): The Brown tree snake (Boiga irregularis) is an arboreal colubrid snake native to eastern and northern coastal Australia, Papua New Guinea, and a large number of islands in northwestern Melanesia.
Output (grade 12): The Brown tree snake (Boiga irregularis) is an arboreal colubrid snake the lives in parts of coastal Australia, Papua New Guinea, and islands in northwestern Melanesia.