C31232233133313221211113313331333133313113311331211113311212121   >>    C3123223313331322121111331333133313331311331133121111331121212   <<    C31232233133313221211113313331333133313113311331211113311212123   >>      C31232233133313221211113313331333133313113311331211113311212122   >>