C11112331312111112111133133313331333133311222121111112113313331323221133231111   >>    C1111233131211111211113313331333133313331122212111111211331333132322113323111   <<    C11112331312111112111133133313331333133311222121111112113313331323221133231113   >>      C11112331312111112111133133313331333133311222121111112113313331323221133231112   >>