C312312111111331312111133133313331331121111331323221211113313331333133112233121   >>    C31231211111133131211113313331333133112111133132322121111331333133313311223312   <<    C312312111111331312111133133313331331121111331323221211113313331333133112233123   >>      C312312111111331312111133133313331331121111331323221211113313331333133112233122   >>