C12313211232233312111111312111133133313331323133313331213331121213313122321321   >>    C1231321123223331211111131211113313331333132313331333121333112121331312232132   <<    C12313211232233312111111312111133133313331323133313331213331121213313122321323   >>      C12313211232233312111111312111133133313331323133313331213331121213313122321322   >>