C12313211232233312111111312111133133313223332233131123321223331   >>    C1231321123223331211111131211113313331322333223313112332122333   <<    C12313211232233312111111312111133133313223332233131123321223333   >>      C12313211232233312111111312111133133313223332233131123321223332   >>