C11112331312111112111133133313331333132322121111331311331333113121122313231   >>    C1111233131211111211113313331333133313232212111133131133133311312112231323   <<    C11112331312111112111133133313331333132322121111331311331333113121122313233   >>      C11112331312111112111133133313331333132322121111331311331333113121122313232   >>