C11112331312111112111133133313331333133313331333112211211111321211   >>    C1111233131211111211113313331333133313331333133311221121111132121   <<    C11112331312111112111133133313331333133313331333112211211111321213   >>      C11112331312111112111133133313331333133313331333112211211111321212   >>