[ku-] Koopa Troopa is in the [4] bathroom of the [-ai] high school where he works as a janitor. Someone has put a huge 夬 boulder in front of the urinals that needs to be taken care of. Koopa Troopa takes out his huge hammer and smashes the 夬 boulder into many 块 lumps of harmless 土 soil with a single tap. Now Koopa Troopa needs to go and clean up all of the 土 soil 块 lumps as the kids who placed the 夬 boulder there in the first place snicker in the corner.