C11112331312111112111133133313331333132322121111331311331333132313331313233121   >>    C1111233131211111211113313331333133313232212111133131133133313231333131323312   <<    C11112331312111112111133133313331333132322121111331311331333132313331313233123   >>      C11112331312111112111133133313331333132322121111331311331333132313331313233122   >>