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