1. albero della castagna   beech   chestnut   fir   oak   Hint Half-n-half Clue   2. faggio   chestnut   beech   oak   poplar   Half-n-half Clue   3. pioppo   poplar   cedar   oak   beech   Half-n-half Clue   4. betulla   maple   birch   poplar   elm   Half-n-half Clue   5. acero   oak   chestnut   poplar   maple   Half-n-half Clue   6. olmo   birch   elm   oak   cedar   Half-n-half Clue   7. cedro   cedar   maple   fir   poplar   Half-n-half Clue