C11112331312111112111133133313331333132323213331333133313132133313231323233211   >>    C1111233131211111211113313331333133313232321333133313331313213331323132323321   <<    C11112331312111112111133133313331333132323213331333133313132133313231323233213   >>      C11112331312111112111133133313331333132323213331333133313132133313231323233212   >>