neku nena nene nenu nera nerc nere nerk nerr neru neua neuc neue neuk neun neur neuu nkau nnnn nrab nrca nren nrna nrrc nuan nuba nubc nube nubk nuca nuce nuck nucu nuee nuer nuka nuke nuku nuna nunc nune nunk nunn nura nurc nure nurn nurr nuru nuuk raab raak raan raba rabb rabe rabk rabu rac- raca racc race rack racu raec raen raer raka rake rakk raku rana ranc rane rank rann rara rarb rare rark raua raub rauc raue rauk raun rbbb rbbr rcac rcbc rccb rccc rcnr rea- reac reae reak rean rear reau reba rebb rebe rebk rebu reca recc rece reck recr recu reeb reek reen reka reke rena rene renk renn renu rera rere reru reue reuk reuu rnbr rrna rrrr rrun ruan ruba rubb rube rubu ruca ruce ruck ruen ruer ruka ruke rukk rukn ruku runa runc rune runk runn rura rurc rure ruru ruun uabc uaca uarc uaru uaua ubac ubar ubba ubbe ubek uber ubra ucak ucan ucar ucbc ucca ucea ucka ucrc ucua ueba ukba ukcc ukek ukeu uknc ukra ukrc ukur unaa unac unan unar unau unbe unca uncc unce uneb unec unee unen uner unka unke unkn unna unne unra urac uran urau urba urbe urca ure- urea urka urke urna urne urra urre uruk urun urur uuen uuuu