C131121333133313233213331333133313331333133313331333133313123223213112222311   >>    C13112133313331323321333133313331333133313331333133313331312322321311222231   <<    C131121333133313233213331333133313331333133313331333133313123223213112222313   >>      C131121333133313233213331333133313331333133313331333133313123223213112222312   >>