C131121333133313233213331333133313331333133313133313331311221123113231   >>    C13112133313331323321333133313331333133313331313331333131122112311323   <<    C131121333133313233213331333133313331333133313133313331311221123113233   >>      C131121333133313233213331333133313331333133313133313331311221123113232   >>