C131121333133313233213331333133313331312111133133313331333133313113311212111   >>    C13112133313331323321333133313331333131211113313331333133313331311331121211   <<    C131121333133313233213331333133313331312111133133313331333133313113311212113   >>      C131121333133313233213331333133313331312111133133313331333133313113311212112   >>