C11112331312111112111133133313331333133313331333133313331211113313231131121   >>    C1111233131211111211113313331333133313331333133313331333121111331323113112   <<    C11112331312111112111133133313331333133313331333133313331211113313231131123   >>      C11112331312111112111133133313331333133313331333133313331211113313231131122   >>