C11112331312111112111133133313331333133313331322133313331333132213233211   >>    C1111233131211111211113313331333133313331333132213331333133313221323321   <<    C11112331312111112111133133313331333133313331322133313331333132213233213   >>      C11112331312111112111133133313331333133313331322133313331333132213233212   >>