nnmc nnnn noaa noac noak noam noba nobc nobm nobo nock noco noko nom- noma nomo non- nona nonn nono noo- noob nook noon nooo noor nor- nora norb norc nork norm norn noro norr nrab nram nrca nrma nrna nroc nron nrrc oama oara obak oban obba obbo obkb obok obon obor obra obro ocab ocac ocak ocam ocan ocbc occa occc occn ocma ocna ocom ocon ocra ocro ocrr okak okam okan okka okko okmo okna okno okok okom okon okor okra okro omac omak omam oman omao omar ombo omca omma omn- omo- omoa omon omoo omor omra omro onab onam onan onar onc- onca onco onna onno onon onor onra ooaa ooak ooba oocr ooma oona oooo oora orab orac orak oram oran orao orar orba orbb orbo orca orco orka orko orma ormn ormo orna ornc orno oro- orok orom oron oror orra orro raab raak raam raan raba rabb rabk rabo rac- raca racc rack raco raka rakk rama ramb ramm ramo rana ranc rank rann rano raob raoc raok raom rara rarb rark raro rbbb rbbr rbmk rcac rcbc rcbo rccb rccc rcnr rcon rman rmon rnbr rnco roab roak roam roan roar rob- roba robb robo roca rocc rock roco roka rokk roko rokr roma romb romk romm romo rona ronc ronk rono roob rook room roon roor rora rorc rork roro rrkm rrmc rrna rrrr