C11112331312111112111133133313331333132322121111331233132311211   >>    C1111233131211111211113313331333133313232212111133123313231121   <<    C11112331312111112111133133313331333132322121111331233132311213   >>      C11112331312111112111133133313331333132322121111331233132311212   >>