C11112331312111112111133133313331333132213221211111211211312111   >>    C1111233131211111211113313331333133313221322121111121121131211   <<    C11112331312111112111133133313331333132213221211111211211312113   >>      C11112331312111112111133133313331333132213221211111211211312112   >>