C12313211232233312111111312111133133313331333132232233122121311   >>    C1231321123223331211111131211113313331333133313223223312212131   <<    C12313211232233312111111312111133133313331333132232233122121313   >>      C12313211232233312111111312111133133313331333132232233122121312   >>