lrfc lric lrif lroc lroi lrrc lrrr o-eo obbo obec obel ober obie oble oboe oboi obol obor obre obrh obri obro ocbc occc occi oce ocee ocef oche ochi oclc ocre ocrl ocro ocrr oec- oecc oeec oeil oele oere ofcl ofcr ofer off- offc offe offh offo offr ofor ofre ohbe ohcc ohee ohel oher ohhi ohho ohif ohio ohob ohoh ohre oici oier oiii oire olbo olcc ole- olef oleh olei oleo oler olfe olib olic olie olio olle olli ollo olof olor oobe oobi oocr ooer ooff ooho oolo oooh oooo oore orbb orbe orbi orbo orce orch orci orco ore- oreb orec oreh orel oreo orer orfe orff orfi orhe ori- oric orie orif oril orio orle orlo oro- oroe orof oror orri orro rbbb rbbr rbcl rble rboh rcbc rcbo rccb rccc rcfc rchb rcic rcle rebb rebe rebo recc rece rech reci recr reeb reef reel refe reff refi refl refr rehb rehe rehi reif reii reil reir relb rele rell relo reof reol rere reri rero rfef rffc rffl rfic rhce rheb rhee rheo rhib rhio rhli rhob rhoc rhoh rib- ribe ribo ricc rice rich rico rief riel rier rife riff riho riif rile rill rilo riol rire riri rlee rlef rlif rob- robb robe robi robo rocc roce roch roco roel roer rofc rofe roff rofl rofo rohe rohl rohr roif roil roio roir role rolf roll rolo roob roof rooi rool roor rorc rore rori roro rrfc rrif rrle rrrr