C131121333133313233213331333133313331333133313331333133313123223212111113112311   >>    C13112133313331323321333133313331333133313331333133313331312322321211111311231   <<    C131121333133313233213331333133313331333133313331333133313123223212111113112313   >>      C131121333133313233213331333133313331333133313331333133313123223212111113112312   >>