C12313211232233312111111312111133133313223332233131123323322231   >>    C1231321123223331211111131211113313331322333223313112332332223   <<    C12313211232233312111111312111133133313223332233131123323322233   >>      C12313211232233312111111312111133133313223332233131123323322232   >>