C131121333133313233213331333133313331333133313331333133313123223211323321   >>    C13112133313331323321333133313331333133313331333133313331312322321132332   <<    C131121333133313233213331333133313331333133313331333133313123223211323323   >>      C131121333133313233213331333133313331333133313331333133313123223211323322   >>