C131121333133313233213331333133313331333133313331333133313123223212231   >>    C13112133313331323321333133313331333133313331333133313331312322321223   <<    C131121333133313233213331333133313331333133313331333133313123223212233   >>      C131121333133313233213331333133313331333133313331333133313123223212232   >>