C12313211232233312111111312111133133313331323321312313223113121   >>    C1231321123223331211111131211113313331333132332131231322311312   <<    C12313211232233312111111312111133133313331323321312313223113123   >>      C12313211232233312111111312111133133313331323321312313223113122   >>