C11112331312111112111133133313231333132313331333112133313223311   >>    C1111233131211111211113313331323133313231333133311213331322331   <<    C11112331312111112111133133313231333132313331333112133313223313   >>      C11112331312111112111133133313231333132313331333112133313223312   >>