4. D B F C E A F C F E D A D E C B E A E C B A B D C B F 5. C C B D B C F A B F A B F A E F D E E C D E D A F E C 6. B 2 1 3 2 3 C A C A 2 A B 3 B A 3 1 B C 1 C 1 2 B 3 C 7. 1 C 3 1 2 A C 3 1 1 A 2 3 B C A B 3 A 2 B C 2 B C 2 A 27