C131121333133313233213331333133313331333133313331333133313311232313222311   >>    C13112133313331323321333133313331333133313331333133313331331123231322231   <<    C131121333133313233213331333133313331333133313331333133313311232313222313   >>      C131121333133313233213331333133313331333133313331333133313311232313222312   >>