nuno nuny nuoc nuon nurc nuri nurn nurr nuru nycc nyco nycy nyim nyny nyom nyon nyrb nyro obbo obby obin oboi obon obor oboy obri obro ocbc occc occi occn ocin ocom ocon ocro ocrr ocum ocur ogb oggi oggy ogin ogni ogog ogoi ogon ogou ogri ogro ogry ogui ogum ogun oici oigo oiii oimb oion oiry oium ombo ombu omic omim omin omio omn- omni omo- omoi omon omoo omor omri omro omuo onby onc- onco ongi ongo ongu onic onir onmy onni onno onon onor onoy onur onym oobi ooby oocr oooo oory orbb orbi orbo orbu orby orci orco orgn orgo orgy ori- oric orig orin orio ormn ormo ormy ornc orni orno orny oro- orom oron oror oroy orri orro orry orub orum oucc ouii ouin ouir oumi oun- oung our- ourn ouro ouu- ouyr oyon oyou oyri oyun rbbb rbbr rcbc rcbo rccb rccc rcgc rcic rcnr rcon rcrg rcyc rgbi rib- ribo ribu riby ricc rico rigg rigi rigo rigu rigy riin rimi rimm rimo rimu rimy ring rinn rino riny riom rion riou riri riyo rmon rmrg rnbr rnco rnin rob- robb robi robo robu roby rocc roco rogg rogi rogo rogy roig roin roio roir roiu romb romi romm romo romy ronc rong roni rono rony roob roog rooi room roon roor rorc rori roro roru rory roub roum roun rouy royn rrmc rrrr rrum rrun rubb rubi rubu ruby ruci rugg rugi ruin rumb rumi rumm rumo rumy runc rung runi runn runo runy ruoy rurc ruri ruro ruru ruun ruyi ryim ryng rynn ryob ryon ryun ubbi ubbo ubic ubii ubir uboc ubon ucbc ucci ucin ucio ucmc ucom ucon ucrc ugcc ugcg uggo ugni ugny ugri ugro ugur uguu uirr umb- umbi umbo umgo ummg ummo umno umor umri uncc uncg unci unco ungo ungu uni- unic unii unin unio unir unmc unmr unni unno unon unro unum uocc uomo uor- urbi urci urcy urgi urgu urib uric urim urin uriu urmi urni uro- urom uroo urri urry urum urun urur uryn uuni uuno uuoc uuri uuuu uuyn uyin uyir ybor ybry yccc ygon ygor ygun yguo ying yirb yirm yirn yirr ymci ymir ymur ynon ynou ynug yobi yobo yogi yogo yomi yomo yong yoni yono yoon yori yorn yoro yory youb youi your yoyn yoyo yrin yron yrun yryn yubu yugg yugi yugo yugu yuin yumi yung yuny yuon yuri yurn yury yuyu yyyy