C31231211111133131211113313331333132233133313331333132223131221   >>    C3123121111113313121111331333133313223313331333133313222313122   <<    C31231211111133131211113313331333132233133313331333132223131223   >>      C31231211111133131211113313331333132233133313331333132223131222   >>