C131121333133313233213331333133313331333133313331333133313123223213322233231   >>    C13112133313331323321333133313331333133313331333133313331312322321332223323   <<    C131121333133313233213331333133313331333133313331333133313123223213322233233   >>      C131121333133313233213331333133313331333133313331333133313123223213322233232   >>