C31232233133313221211113313331333133313331212111133133313212121   >>    C3123223313331322121111331333133313331333121211113313331321212   <<    C31232233133313221211113313331333133313331212111133133313212123   >>      C31232233133313221211113313331333133313331212111133133313212122   >>