C12313211232233312111111312111133133313331333132232233122313231321311   >>    C1231321123223331211111131211113313331333133313223223312231323132131   <<    C12313211232233312111111312111133133313331333132232233122313231321313   >>      C12313211232233312111111312111133133313331333132232233122313231321312   >>