C11112331312111112111133133313331333133313123313331123311211331   >>    C1111233131211111211113313331333133313331312331333112331121133   <<    C11112331312111112111133133313331333133313123313331123311211333   >>      C11112331312111112111133133313331333133313123313331123311211332   >>