C111112111133131121133133313331333133313331332133313331333133313331333231312121   >>    C11111211113313112113313331333133313331333133213331333133313331333133323131212   <<    C111112111133131121133133313331333133313331332133313331333133313331333231312123   >>      C111112111133131121133133313331333133313331332133313331333133313331333231312122   >>