C11112331312111112111133133313331333132323213331333133313113133313223113213221   >>    C1111233131211111211113313331333133313232321333133313331311313331322311321322   <<    C11112331312111112111133133313331333132323213331333133313113133313223113213223   >>      C11112331312111112111133133313331333132323213331333133313113133313223113213222   >>