bbbb bboy bbyo bibb bibi bibo bimo bio- bioi biou birb biri biro birr biru biry bmir bmmi bobb bobi bobo bobu boby boi- boii boim boiu bomb bomi bomu bomy boob boom boor bor- bori borm boro borr boru bory boum bour bouy boyi boyo brim brio brob brom broo bror brou brrm brrr brum bry- bryo bubb bubi bubo bubu buir buiu bum- bumb buoy bur- burb buri burm buro burr buru bury buyi buyo buyu byob byoi i-by ibbm ibim ibri ibro ibuy ibyi iiii iiio iioi iioo iium imbi imir immi immo immy imou imri imro imrr iobi ioby ioii ioio iomo iooi iooo iori irbm irby iri- irio iriy irmo irob irri iuiu mbim mbio mbou miii miio mim- mimi mimo mimy mio- miri miro mirr miru miry miui miyu mmii mmmm mmor mmyy mobb mobi mobo moby moii moio moir momi momo momu momy moob moor morb mori moro moru mory mour mouy moyo moyu mrbb mrbm mubi mubo muir mumm mumo mumu mumy muri muro murr muru mury mybb mybi myi- myir mymy myo- myob myro myrr myry obbo obby oboi obor oboy obri obro oiii oimb oiry oium ombo ombu omim omio omo- omoi omoo omor omri omro omuo oobi ooby oooo oory orbb orbi orbo orbu orby ori- orio ormo ormy oro- orom oror oroy orri orro orry orub orum ouii ouir oumi our- ouro ouu- ouyr oyou oyri rbbb rbbr rib- ribo ribu riby rimi rimm rimo rimu rimy riom riou riri riyo rob- robb robi robo robu roby roio roir roiu romb romi romm romo romy roob rooi room roor rori roro roru rory roub roum rouy rrrr rrum rubb rubi rubu ruby rumb rumi rumm rumo rumy ruoy ruri ruro ruru ruyi ryim ryob ubbi ubbo ubii ubir uirr umb- umbi umbo ummo umor umri uomo uor- urbi urib urim uriu urmi uro- urom uroo urri urry urum urur uuri uuuu uyir ybor ybry yirb yirm yirr ymir ymur yobi yobo yomi yomo yori yoro yory youb youi your yoyo yubu yumi yuri yury yuyu yyyy