C131121333133313233213331333133313331333133313331333133313123223212113311   >>    C13112133313331323321333133313331333133313331333133313331312322321211331   <<    C131121333133313233213331333133313331333133313331333133313123223212113313   >>      C131121333133313233213331333133313331333133313331333133313123223212113312   >>