C31232233133313221211113313331333133313113311331333133313331312313232212121   >>    C3123223313331322121111331333133313331311331133133313331333131231323221212   <<    C31232233133313221211113313331333133313113311331333133313331312313232212123   >>      C31232233133313221211113313331333133313113311331333133313331312313232212122   >>