C11112331312111112111133133313331333133311222121111112113313331323221133232231   >>    C1111233131211111211113313331333133313331122212111111211331333132322113323223   <<    C11112331312111112111133133313331333133311222121111112113313331323221133232233   >>      C11112331312111112111133133313331333133311222121111112113313331323221133232232   >>