C131121333133313233213331333133313331333133313331333133313123223212111133312311   >>    C13112133313331323321333133313331333133313331333133313331312322321211113331231   <<    C131121333133313233213331333133313331333133313331333133313123223212111133312313   >>      C131121333133313233213331333133313331333133313331333133313123223212111133312312   >>