llll lloo loll lolo lono lonr lool loon loop loor lopp lorn loro lppl lprp lron lrrr nlrp nnnn nnpr noll nolo nolp non- nonn nono noo- nool noon nooo noop noor nor- norn noro norr nppl nron nrpn nrrl ollo olon olor onno onon onor oolo oooo opo- opon opor oppo orlo orno oro- oron oror orro plon ploo plop plpp pnln pnnl pnon pnpo pnpp pnro poll polo pono ponp pool poon poop poor pop- popo popp porn poro porr pplo pppn pppo pppp prlr prnp pro- prol pron proo prop roll rolo rolp rono rool roon roop roor ropo roro rpon rppn rrrr