C131121333133313233213331333133313331333133313331333133313331333313132311   >>    C13112133313331323321333133313331333133313331333133313331333133331313231   <<    C131121333133313233213331333133313331333133313331333133313331333313132313   >>      C131121333133313233213331333133313331333133313331333133313331333313132312   >>