C12313211232233312111111312111133133313331323321312313223321221   >>    C1231321123223331211111131211113313331333132332131231322332122   <<    C12313211232233312111111312111133133313331323321312313223321223   >>      C12313211232233312111111312111133133313331323321312313223321222   >>