C11112331312111112111133133313331333133313331333133313331211113313122121121   >>    C1111233131211111211113313331333133313331333133313331333121111331312212112   <<    C11112331312111112111133133313331333133313331333133313331211113313122121123   >>      C11112331312111112111133133313331333133313331333133313331211113313122121122   >>