1. bouleau   pine   beech   birch   chestnut   Hint Half-n-half Clue   2. arbre de châtaigne   chestnut   fir   beech   cedar   Half-n-half Clue   3. sapin   fir   birch   maple   poplar   Half-n-half Clue   4. cèdre   maple   poplar   pine   cedar   Half-n-half Clue   5. orme   fir   poplar   elm   chestnut   Half-n-half Clue   6. érable   elm   oak   maple   beech   Half-n-half Clue   7. chêne   oak   chestnut   poplar   elm   Half-n-half Clue