1 10 C A D B A C D B D A 11 12 13 14 15 16 17 18 19 20 21 A C C D A B D C B A D 10 A C D C C A C B A B 11 12 13 14 15 16 17 18 19 20 A B B A A C B B B B 10 A A C D D C B B C C 11 12 13 14 15 16 17 18 19 20 B C A C A A A B D C