C31231211111133131211113313331333132233133313331333133313222223321   >>    C3123121111113313121111331333133313223313331333133313331322222332   <<    C31231211111133131211113313331333132233133313331333133313222223323   >>      C31231211111133131211113313331333132233133313331333133313222223322   >>