llll lloo lo-v loll lolo lono lonr lool loon loop loor lopp lorn loro lovo lppl lprp lron lrrr lvov lvrr nlrp nnnn nnpr noll nolo nolp non- nonn nono noo- nool noon nooo noop noor noov nor- norn noro norr norv nov- novo npov nppl nron nrpn nrrl ollo olon olor olov onno onon onor oolo oooo opo- opon opor oppo orlo orno oro- oron oror orro orvr ovo- ovol ovon ovoo ovpp plon ploo plop plov plpp pnln pnnl pnon pnpo pnpp pnro poll polo pono ponp pool poon poop poor pop- popo popp porn poro porr povl povo pplo pppn pppo pppp prlr prnp pro- prol pron proo prop prov pvlv rnpv roll rolo rolp rono rool roon roop roor ropo roro rovo rpon rppn rrrr voll volo volp vonn vool voor vor- voro vplp vpon vpro vrnn vron vrpn vvvv