C131121333133313233213331333133313331333133313331333133313123223212312113311   >>    C13112133313331323321333133313331333133313331333133313331312322321231211331   <<    C131121333133313233213331333133313331333133313331333133313123223212312113313   >>      C131121333133313233213331333133313331333133313331333133313123223212312113312   >>