C12313211232233312111111312111133133313331333132232233122232123221   >>    C1231321123223331211111131211113313331333133313223223312223212322   <<    C12313211232233312111111312111133133313331333132232233122232123223   >>      C12313211232233312111111312111133133313331333132232233122232123222   >>