C131121333133313233213331333133313331333133313331333133313331333121311321   >>    C13112133313331323321333133313331333133313331333133313331333133312131132   <<    C131121333133313233213331333133313331333133313331333133313331333121311323   >>      C131121333133313233213331333133313331333133313331333133313331333121311322   >>