C31231211111133131211113313331333133313331323133313232233212321   >>    C3123121111113313121111331333133313331333132313331323223321232   <<    C31231211111133131211113313331333133313331323133313232233212323   >>      C31231211111133131211113313331333133313331323133313232233212322   >>