1. 機関   seat   shock absorber   engine   tricycle   Hint Half-n-half Clue   2. タイヤ空気圧   tire pressure   sprocket   handbrake   wheel   Half-n-half Clue   3. 三輪車   shock absorber   handbrake   tricycle   gear lever   Half-n-half Clue   4. 安全帽子   handbrake   helmet   sprocket   chain   Half-n-half Clue   5. 排気管   seat   shock absorber   pedal   exhaust pipe   Half-n-half Clue   6. 車輪   engine   shock absorber   wheel   pedal   Half-n-half Clue   7. 錠   exhaust pipe   lock   shock absorber   seat   Half-n-half Clue