C12313211232233312111111312111133133313331333132232233122211222112131   >>    C1231321123223331211111131211113313331333133313223223312221122211213   <<    C12313211232233312111111312111133133313331333132232233122211222112133   >>      C12313211232233312111111312111133133313331333132232233122211222112132   >>