C31231211111133131211113313331333133313332233133313133313112122331   >>    C3123121111113313121111331333133313331333223313331313331311212233   <<    C31231211111133131211113313331333133313332233133313133313112122333   >>      C31231211111133131211113313331333133313332233133313133313112122332   >>