C11112331312111112111133133313331333132322121111331333112211232212111   >>    C1111233131211111211113313331333133313232212111133133311221123221211   <<    C11112331312111112111133133313331333132322121111331333112211232212113   >>      C11112331312111112111133133313331333132322121111331333112211232212112   >>