C11112331312111112111133133313331333133311222331333131323311211   >>    C1111233131211111211113313331333133313331122233133313132331121   <<    C11112331312111112111133133313331333133311222331333131323311213   >>      C11112331312111112111133133313331333133311222331333131323311212   >>