C131121333133313233213331333133313331333133313331333133313123223211121211   >>    C13112133313331323321333133313331333133313331333133313331312322321112121   <<    C131121333133313233213331333133313331333133313331333133313123223211121213   >>      C131121333133313233213331333133313331333133313331333133313123223211121212   >>