C12313211232233312111111312111133133313331323321312313223311111   >>    C1231321123223331211111131211113313331333132332131231322331111   <<    C12313211232233312111111312111133133313331323321312313223311113   >>      C12313211232233312111111312111133133313331323321312313223311112   >>