bbbb bftt bibb bibi bibo biff bifi bimo bio- bioi biot biou birb biri biro birr birt biru bito bitt bitu bmir bmmi bobb bobi bobo bobu boff bofu boi- boii boim boit boiu bomb bomi bomt bomu boob boof boom boor boot bor- borf bori borm boro borr bort boru botb boti boto bott bouf boum bour bout brfm brfu brim brio brit brob brom broo bror brot brou brrm brrr brum brut btob btor btrt bttb bubb bubi bubo bubu buff bufo bufr buif buir buit buiu bum- bumb bumf bur- burb buri burm buro burr burt buru but- buti buto butt fbom ffff ffii ffrr fftf fiff fifi fifm fifo fift fiii fimo fimr fior firm fiti fitt fmri fobt fofo fomo fomt foof foom foot for- forb fori form foro forr fort foti fotm foto fott four fout frib frim frio frit frob from frot frou frub frum ftii ftub fubb fubu fuff fufu fuir fuit fumi fumo fuor fur- furi furm furo furr furt futi futo futu ibbm ibfi ibim ibot ibri ibro ibtb ifbb ifim ifit ifor ifrb ifrf ifri ifto iiii iiio iiit iioi iioo iitm iitr iitt iium imbi imfi imir imit immi immo immt imof imou imri imro imrr imto iobi ioii ioio ioit iomo ioof iooi iooo iori iotf ioto irbm irfm irfu iri- irio irmo irob irri irtf irti itif itim itmo itof itoi itoo itor itou itrf itri ittf itto itum itur iuiu mbim mbio mbou mfbm mfor mfou mfri mftf miff mifi miii miio miit mim- mimi mimo mio- miri miro mirr mirt miru mit- mitb miti mitm mito mitt mitu miui mmff mmii mmmm mmor mmrf mobb mobi mobo moff mofo mofu moif moii moio moir moit momi momo momu moob moor moot morb morf mori moro mort moru motb moti motm moto mott motu mouf mour mout mrbb mrbm mrtm mrtt mtbo mtff mtom mtor mtrr mttr mubi mubo muff mufi mufu muir muit mumm mumo mumu muri muro murr murt muru muti muto mutt mutu muut obbo obit oboi obor obot obri obro off- offo offr offu ofit ofor oiii oimb oirt oiti oium ombo ombu omim omio omit omo- omoi omoo omor omri omro omuo oobi ooff oooo oort ootb orbb orbi orbo orbu orff orfi orfu ori- orif orio orit ormo oro- orof orom oror orot orri orro orto orub orum otif otit oto- otof otoo otor otro otti otto ottu otur ouff ouii ouir ouit oumi our- ouro ourt out- outb outi outo ouu- rbbb rbbr rib- ribo ribu riff rift rifu riif rimi rimm rimo rimu riom riot riou riri riti rito ritt ritu rmif rmtu rob- robb robi robo robt robu roff rofo roif roio roir roit roiu romb romi romm romo roob roof rooi room roor root rori roro rort roru roti roto rotr rott roub rouf roum rout rrif rrrr rrum rtbf rtfb rtfm rtmi rubb rubi rubu ruff rufo ruft ruif ruit rumb rumi rumm rumo rumt ruri ruro ruru ruti ruto rutt rutu t-mo tbit tbrb tfot tibi tibu tiff tifo tift tiit tiiu timi timm timo timu tiou tirb tiri tiro tirr tiru titi tito titt titu tium tmbr tmou tmro tmtt tobi tobo tobt tobu toff tofi tofo toft tofu toit tomb tomi tomm tomo tomt toof toom toor toot torf tori torm toro torr tort toru toti totm toto totr tott toui toum tour tout trfm trfr tri- trib trif trim trio trit trmb trmi trmu troi trom troo trot trou trtr trub trut truu ttbb ttff ttim tttt tubb tubo tubr tubu tuff tufi tufm tufo tuft tufu tuim tuit tuiu tumb tumi tumu tuor turb turf turi turm turo turr turt turu tuti tuto tutt tutu tuum tuuo ubbi ubbo ubii ubir ubit ubtf uirr umb- umbi umbo umff umit ummo umor umri umut uofm uofo uomo uor- urbi urff urfi urft urib urif urim uriu urmi uro- urom uroo urri urum urur urut utfo utmb utor utri utti utto uttu uuri uutf uuuu