C12313211232233312111111312111133133313331323321312313223112131   >>    C1231321123223331211111131211113313331333132332131231322311213   <<    C12313211232233312111111312111133133313331323321312313223112133   >>      C12313211232233312111111312111133133313331323321312313223112132   >>