bbbb bblb bibb bibi bibl bibo bili bill bilo bilu bimo bio- bioi biol biou birb biri birl biro birr biru blim blio blir blob blom bloo blou blub blum blur bmir bmmi bobb bobi bobo bobu boi- boii boil boim boiu boli boll bolm bolo bolu bomb bomi bomu boob bool boom boor bor- bori borm boro borr boru boul boum bour bril brim brio brob brol brom broo bror brou brrm brrr brum bubb bubi bubo bubu buir buiu bulb buli bull bulu bum- bumb buol bur- burb buri burl burm buro burr buru ibbm ibim ibml ibri ibro iiii iiio iioi iioo iium ilbm ilio ilir ill- illi illo ilmo ilmr iloo ilrm ilum imbi imir imli immi immo imou imri imro imrr iobi ioii ioio iolo iomo iooi iooo iori irbm iri- iril irio irlb irmo irob irri irul iuiu lblr libo libr libu liii liir lilb lili lill lilo lilu limb limi liml limm limo limu lio- liom lior liri lirl liro lirr liru llll lloo lmbo lmii lmmr lob- lobb lobi lobo loir loiu loli loll lolo lomb lomi lomm lomo lomu loob lool loom loor lori loro loui loul loum lour louu lroi lrrr luli lull lulu lumb lumi lumo luri mbim mbio mbou miii miio mili mill milo milr milu mim- mimi mimo mio- miol miri mirl miro mirr miru miui mlii mmii mmli mmmm mmor mobb mobi mobo moii moil moio moir moli moll molo molr momi momo momu moob mool moor morb mori morl moro moru moul mour mrbb mrbm mrml mubi mubo muil muir muli mull mulm mulo mulu mumm mumo mumu muri murl muro murr muru obbo oblu oboi obol obor obri obro oiii oimb oium olbo olib olim olio olli ollo olmi olmo olom olor olur ombo ombu omim omio omo- omoi omoo omor omri omro omul omuo oobi oolo oooo orbb orbi orbo orbu ori- oril orio orlo orlu ormo oro- orom oror orri orro orub orum ouii ouir oulu oumi our- ouro ouu- rbbb rbbr rib- ribo ribu rill rilo rilu rimi rimm rimo rimu riol riom riou riri rlml rmll rob- robb robi robo robu roil roio roir roiu roll rolm rolo romb romi romm romo roob rooi rool room roor rori roro roru roub roul roum rrrr rrum rubb rubi rubu rull rulo rumb rumi ruml rumm rumo ruri ruro ruru ubbi ubbo ubii ubir ubli ublo uiml uirr ulim ulli ullo ullr ulmi ulmo ulmu ulo- ulul ulum umb- umbi umbo ummo umol umor umri uoml uomo uor- urbi urib urim uriu urmi uro- urol urom uroo urri urum urur uulu uuri uuuu