C11112331312111112111133133313331333132323213331333133313231231312121   >>    C1111233131211111211113313331333133313232321333133313331323123131212   <<    C11112331312111112111133133313331333132323213331333133313231231312123   >>      C11112331312111112111133133313331333132323213331333133313231231312122   >>