nili nilk nill nilu nine ninh nini ninl nire niru niue niur nler nlrb nnnn nren nrlb nrrl nube nubi nubk nubl nuee nuel nuer nuhi nuik nuin nuke nuki nuku nule nuli null nune nunk nunn nure nuri nurl nurn nurr nuru nuuk rbbb rbbr rble rebb rebe rebk rebu reeb reek reel reen rehb rehe rehi rehn reii reik reil rein reir reiu reke reki relb rele rell rene reni renk renn renu rere reri reru reue reuk reul reuu rheb rhee rhen rhib rhin rhli rhue rhun rib- ribe ribu riek riel rien rier rieu riin rike riki rikk riku rile rill rilu rine rink rinn rire riri riue rlee rleu rlin rnbr rnhl rnie rnin rnli rrle rrrr rrun rubb rube rubi rubu ruel ruen ruer ruhe ruhh ruhi ruhl ruhn ruhr ruin ruke rukh ruki rukk rukn ruku rule rulk rull rune runi runk runn rure ruri ruru ruun u-ie ubbe ubbi ubek uber ubii ubik ubir uble ubli uein ueir ueki uele ueli uell uher uhle uhuh uile uirr ukek ukeu ukur uleb ulee ulek ulen ulie ulik ulle ulli ullr ulne uluk ulul unbe uneb unee unen uner uni- unie unii unik unin unir unke unkl unkn unle unne unni urbe urbi ure- ureh urib urie urik urin uriu urke urle urne urni urre urrh urri uruk urun urur uuen uulu uuni uuri uuuu