C12313211232233312111111312111133133313331323133313331213333213232131223323221   >>    C1231321123223331211111131211113313331333132313331333121333321323213122332322   <<    C12313211232233312111111312111133133313331323133313331213333213232131223323223   >>      C12313211232233312111111312111133133313331323133313331213333213232131223323222   >>