1. ポプラ.   chestnut   fir   oak   poplar   Hint Half-n-half Clue   2. オーク   oak   fir   birch   elm   Half-n-half Clue   3. モミ   oak   fir   poplar   maple   Half-n-half Clue   4. カエデ.   maple   birch   pine   cedar   Half-n-half Clue   5. ブナ.   poplar   chestnut   birch   beech   Half-n-half Clue   6. マツ   elm   maple   pine   chestnut   Half-n-half Clue   7. クリ   beech   maple   cedar   chestnut   Half-n-half Clue