bbbb bbci bbfc bblb bbrc bcbc bccc bcci bccl bcfc bcof bcor bcru bcuc bffl bibb bibi bibl bibo bicc bici bico biff bifi bili bill bilo bilu bio- bioc bioi biol biou birb biri birl biro birr biru blcu blfc blic blio blir blob bloc bloo blou blrc blub bluf blur bobb bobi bobo bobu boco bocu boff bofu boi- boii boil boiu boli boll bolo bolu boob booc boof bool boor bor- borf bori boro borr boru bouf boul bour brcb brfc brfu bric bril brio brob broc brol broo bror brou brrr bruc bubb bubi bubo bubu bucc buci buco bucu bufc buff bufo bufr buic buif buir buiu bulb buli bull bulu buol bur- burb buri burl buro burr buru c-bo cbbc cbcc cbcl cbcr cbcu cbfb cbfc cbir cblb cblc cbol cbrl ccbc cccb cccc cccf ccci cccl cccu ccfc ccff ccfi ccfl ccic ccii ccil ccir cclc ccli ccob ccoc ccrc ccrf ccri ccrl ccuc cfbc cfbr cfcb cfcf cfcl cfco cffb cffr cfor cfrb cibc cibi cibo cicc cici cico cicr cicu ciff cifl ciii cili cill cilo ciob cior cirb circ ciri cirl ciro cirr ciuc clib clic clif clii clio clir clob clof cloo clor clou clri clro club cobb cobi cobo cobu coco cocu cofc coff cofi coif coil coir col- colb coli coll colo colu coob coof cool cor- corb corc corf cori corl coro corr coub coul cour crbc crbu crcc crcr crfc crfl crib cric crif criu crlf crob croc crol croo cror crub cub- cubb cubi cucc cuci cufc cuff cufi cufo cui- cuif cuil cuir culb culc cull culo curb curf curi curl curo curr fccf fcic fcii ffcc ffff ffii ffrr ficc fico fifc fiff fifi fifo fiii fiil fili fill filo fior flcl flic flii flob floc floo flor flou flub fluf fluo flur foci foco fofo foil folc foli foll folo folr foof fool for- forb fori forl foro forr foul four frbc frcc frfc frib fric fril frio frob frol frou frub fubb fubu fuc- fuci fufc fuff fufu fuil fuir fuli full fulu fuor fur- furi furl furo furr ibfi ibrc ibri ibro icbc iccb iccc iccf icci iccl icco iccr iccu icfb icll iclr icoc icor icrc icrf icrr icru icub ifbb ifco ific ifil ifor ifrb ifrf ifri iiii iiio iioi iioo iirc iiuc ilbc ilic ilio ilir ill- illi illo iloc iloo iobi ioci iofc ioii ioio iolo ioof iooi iooo iori ircc ircu irfu iri- iric iril irio irlb irob iroc irrc irri irul iucc iuiu lbcc lblr lcbc lccc lcfc lcfr lcor lcrl lfcc libc libo libr libu lico licr liff lifl lifo liii liir lilb lili lill lilo lilu lio- lior lirc liri lirl liro lirr liru liuf llcc lllc llll lloc lloo lob- lobb lobi lobo locc loci loco locu loff lofi loic loif loir loiu loli loll lolo loob looc loof lool loor lori loro loui loul lour louu lrfc lric lrif lroc lroi lrrc lrrr luci luff lufu luif luli lull lulu luri obbo oblu oboi obol obor obri obro ocbc occc occi oclc ocrl ocro ocrr ocul ocur ofcl ofcr off- offc offo offr offu ofor oici oiii olbo olcc olib olic olio olli ollo olof olor olur oobi oocr ooff oolo oooo orbb orbi orbo orbu orci orco orff orfi orfu ori- oric orif oril orio orlo orlu oro- orof oror orri orro orub oucc oufc ouff ouii ouir oulu our- ouro ouu- rbbb rbbr rbcl rcbc rcbo rccb rccc rcfc rcic rffc rffl rfic rib- ribo ribu ricc rico riff rifu riif rill rilo rilu riol riou riri rlif rob- robb robi robo robu rocc roco rofc roff rofl rofo roif roil roio roir roiu rolf roll rolo roob roof rooi rool roor rorc rori roro roru roub rouf roul rrfc rrif rrrr rubb rubi rubu ruci rufc ruff rufo ruif rull rulo rurc ruri ruro ruru ubbi ubbo ubic ubii ubir ubli ublo uboc ucbc ucci ucfb ucil ucio ucrc ufcu uirr ulbc ulcc ulco ulic ulli ullo ullr ulo- uloc ulul uocc uofl uofo uolc uor- urbi urci urff urfi urib uric urif uriu uro- urol uroo urri urur uulu uuoc uuri uuuu