C12313211232233312111111312111133133313331333132232233122211221123131   >>    C1231321123223331211111131211113313331333133313223223312221122112313   <<    C12313211232233312111111312111133133313331333132232233122211221123133   >>      C12313211232233312111111312111133133313331333132232233122211221123132   >>