C312312111111331312111133133313331331121111331333133311223223313331323212221   >>    C31231211111133131211113313331333133112111133133313331122322331333132321222   <<    C312312111111331312111133133313331331121111331333133311223223313331323212223   >>      C312312111111331312111133133313331331121111331333133311223223313331323212222   >>