C12313211232233312111111312111133133313331333132232233122211213221   >>    C1231321123223331211111131211113313331333133313223223312221121322   <<    C12313211232233312111111312111133133313331333132232233122211213223   >>      C12313211232233312111111312111133133313331333132232233122211213222   >>