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A B A B C B C A B B A D C A B D D B C B C B B A B C C A C D C B C C B C D D C C B C B C D D A B D A
B A D A C D A C D D A D B A B A B B D
A C A D C B A D A A C C B C C B C A A D
D A A C C A C D C D B A B C A C B D B C
C A A B B B B D B C D C D C B A C C D