1. poplar   olmo   haya   pino   álamo   Hint Half-n-half Clue   2. pine   arce   abedul   pino   álamo   Half-n-half Clue   3. maple   castaño   olmo   pino   arce   Half-n-half Clue   4. oak   pino   cedro   castaño   roble   Half-n-half Clue   5. beech   abedul   haya   castaño   cedro   Half-n-half Clue   6. birch   pino   olmo   castaño   abedul   Half-n-half Clue   7. chestnut   abedul   cedro   haya   castaño   Half-n-half Clue