C131121333133313233213331333133313331333133313331333133313123223212113313223221   >>    C13112133313331323321333133313331333133313331333133313331312322321211331322322   <<    C131121333133313233213331333133313331333133313331333133313123223212113313223223   >>      C131121333133313233213331333133313331333133313331333133313123223212113313223222   >>