C131121333133313233213331333133313331333133313331333133313123223212111112112331   >>    C13112133313331323321333133313331333133313331333133313331312322321211111211233   <<    C131121333133313233213331333133313331333133313331333133313123223212111112112333   >>      C131121333133313233213331333133313331333133313331333133313123223212111112112332   >>