b-u bbb bbf bbi bbm bbo bbr bbu bfb bff bfi bfm bfo bfr bfu bi- bib bif bii bim bio bir biu bmb bmf bmi bmm bmo bmr bmu bob bof boi bom boo bor bou brb brf bri brm bro brr bru bub buf bui bum buo bur buu fbb fbf fbi fbm fbo fbr fbu fff ffi ffm ffo ffr ffu fib fif fii fim fir fiu fmb fmf fmi fmm fmo fmr fmu fob fof foi fom foo for fou frb frf fri frm fro frr fru fub fuf fui fum fuo fur fuu i-f ibb ibf ibi ibm ibo ibr ibu ifb iff ifi ifm ifo ifr ifu iib iif iii iim iio iir iiu im- imb imf imi imm imo imu io- iob iof ioi iom ioo ior iou ir- irb irf iri irm iro irr iru iu- iub iui ium iur m-f m-o m-r mbb mbf mbi mbm mbo mbr mbu mfb mff mfi mfm mfo mfr mfu mi- mib mif mii mim mio mir miu mmb mmf mmi mmm mmo mmr mmu mob mof moi mom moo mor mou mrb mrf mri mrm mro mrr mru mub muf mui mum mur muu o-i ob- obb obf obi obm obo obr obu of- ofb off ofi ofm ofo ofr ofu oib oif oii oim oio oir oiu om- omb omf omi omm omo omr omu oo- oob oof ooi oom ooo oor or- orb orf ori orm oro orr oru ou- ouf oui oum ouo our rbb rbf rbi rbm rbo rbr rbu rfb rff rfi rfm rfo rfr rfu rib rif rii rim rio rir rmb rmf rmi rmm rmo rmr rob rof roi rom roo ror rou rrb rrf rri rrm rrr rru rub ruf rui rum ruo rur ruu ubb ubf ubi ubo ubr ubu uff ufi ufm ufo ufr ufu uib uif uii uim uio uir uiu um- umb umf umi umm umo umr umu uob uom uoo uor ur- urb urf uri urm uro urr uru uum uur uuu

bbbb bibb bibi bibo biff bifi bimo bio- bioi biou birb biri biro birr biru bmir bmmi bobb bobi bobo bobu boff bofu boi- boii boim boiu bomb bomi bomu boob boof boom boor bor- borf bori borm boro borr boru bouf boum bour brfm brfu brim brio brob brom broo bror brou brrm brrr brum bubb bubi bubo bubu buff bufo bufr buif buir buiu bum- bumb bumf bur- burb buri burm buro burr buru fbom ffff ffii ffrr fiff fifi fifm fifo fiii fimo fimr fior firm fmri fofo fomo foof foom for- forb fori form foro forr four frib frim frio frob from frou frub frum fubb fubu fuff fufu fuir fumi fumo fuor fur- furi furm furo furr ibbm ibfi ibim ibri ibro ifbb ifim ifor ifrb ifrf ifri iiii iiio iioi iioo iium imbi imfi imir immi immo imof imou imri imro imrr iobi ioii ioio iomo ioof iooi iooo iori irbm irfm irfu iri- irio irmo irob irri iuiu mbim mbio mbou mfbm mfor mfou mfri miff mifi miii miio mim- mimi mimo mio- miri miro mirr miru miui mmff mmii mmmm mmor mmrf mobb mobi mobo moff mofo mofu moif moii moio moir momi momo momu moob moor morb morf mori moro moru mouf mour mrbb mrbm mubi mubo muff mufi mufu muir mumm mumo mumu muri muro murr muru obbo oboi obor obri obro off- offo offr offu ofor oiii oimb oium ombo ombu omim omio omo- omoi omoo omor omri omro omuo oobi ooff oooo orbb orbi orbo orbu orff orfi orfu ori- orif orio ormo oro- orof orom oror orri orro orub orum ouff ouii ouir oumi our- ouro ouu- rbbb rbbr rib- ribo ribu riff rifu riif rimi rimm rimo rimu riom riou riri rmif rob- robb robi robo robu roff rofo roif roio roir roiu romb romi romm romo roob roof rooi room roor rori roro roru roub rouf roum rrif rrrr rrum rubb rubi rubu ruff rufo ruif rumb rumi rumm rumo ruri ruro ruru ubbi ubbo ubii ubir uirr umb- umbi umbo umff ummo umor umri uofm uofo uomo uor- urbi urff urfi urib urif urim uriu urmi uro- urom uroo urri urum urur uuri uuuu

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b-room bbbbbb bibiri bibiru biform biobor biomom biribi birori bobbio bobiri bombom bombur booboo boom-o borbor borium bormio boromo bororo boubou bourou bribir bribri brimir bromio bromo- brubru bubbio bububu buffum bufori bumboo burbur burior buriro burrio bururi f-bomb fibro- firmor fobiri foboff fombio foofoo foofur foorum formo- foufou fourbi fourof fourou