-ic b-u bbb bbc bbf bbi bbo bbr bbs bbu bcb bcc bcf bci bco bcr bcs bcu bfb bfc bff bfi bfo bfr bfs bfu bi- bib bic bif bii bio bir bis biu bob boc bof boi boo bor bos bou brb brf bri bro brr brs bru bsb bsc bsf bsi bso bsr bss bsu bub buc buf bui buo bur bus buu c-- cbb cbc cbf cbi cbo cbr cbs cbu ccb ccc ccf cci cco ccr ccs ccu cfb cfc cff cfi cfo cfr cfs cfu ci- cib cic cif cii cio cir cis ciu co- cob coc cof coi coo cor cos cou crb crc crf cri cro crr crs cru csb csc csf csi cso csr css csu cub cuc cuf cui cuo cur cus cuu fbb fbc fbf fbi fbo fbr fbs fbu fcb fcc fcf fci fco fcr fcs fcu ffc fff ffi ffo ffr ffs ffu fib fic fif fii fir fis fiu fob foc fof foi foo for fos fou frb frc frf fri fro frr frs fru fsb fsc fsf fsi fso fsr fss fsu fub fuf fui fuo fur fus fuu i-f ibb ibc ibf ibi ibo ibr ibs ibu icb icc icf ici ico icr ics icu ifb ifc iff ifi ifo ifr ifs ifu iib iic iif iii iio iir iis iiu io- iob ioc iof ioi ioo ior ios iou ir- irb irc irf iri iro irr irs iru is- isb isc isf isi iso isr iss isu iu- iub iuc iui iur ius o-i ob- obb obc obf obi obo obr obs obu oc- ocb occ ocf oci oco ocr ocs ocu of- ofb ofc off ofi ofo ofr ofs ofu oib oic oif oii oio oir ois oiu oo- oob ooc oof ooi ooo oor oos or- orb orc orf ori oro orr ors oru os- osb osc osf osi oso osr oss osu ou- ouc ouf oui ouo our ous rbb rbc rbf rbi rbo rbr rbs rbu rcb rcc rcf rci rco rcr rcs rcu rfb rfc rff rfi rfo rfr rfs rfu rib ric rif rii rio rir ris rob roc rof roi roo ror ros rou rrb rrc rrf rri rrr rrs rru rsb rsc rsf rsi rso rsr rss rsu rub ruc ruf rui ruo rur rus ruu sbb sbc sbf sbi sbo sbr sbs sbu scb scc scf sci sco scr scs scu sfb sfc sff sfi sfo sfr sfs sfu sib sic sif sii sio sir sis siu sob soc sof soi soo sor sos sou sr- srb src srf sri sro srr srs ss- ssb ssc ssf ssi sso ssr sss ssu sub suc suf sui suo sur sus suu ubb ubc ubf ubi ubo ubr ubs ubu ucb ucc ucf uci uco ucr ucs ucu ufc uff ufi ufo ufr ufs ufu uib uic uif uii uio uir uis uiu uob uoc uoo uor uos ur- urb urc urf uri uro urr urs uru usb usc usf usi uso usr uss usu uuc uur uus uuu

-ous bbbb bbbs bbci bbfc bbrc bcbc bcbs bccc bcci bccs bcfc bcis bcof bcor bcos bcrs bcru bcsc bcss bcuc bfcs bffs bfsi bfsr bibb bibi bibo bibs bicc bici bico bics biff bifi biis bio- bioc bioi bios biou birb biri biro birr birs biru bis- bisc biso biss bisu bobb bobi bobo bobs bobu boco bocs bocu boff bofs bofu boi- boii bois boiu boob booc boof boor boos bor- borf bori boro borr bors boru bosc bosi boso boss bosu bouf bour bous brcb brfc brfu bric brio bris brob broc broo bror bros brou brrr brrs brsb brsr bruc brus bsci bscs bsfc bsff bsfs bsic bsos bssc bubb bubi bubo bubs bubu bucc buci buco bucs bucu bufc buff bufo bufr buic buif buir buis buiu bur- burb buri buro burr burs buru busc busi buss busu buus c-bo cbbc cbbs cbcc cbcr cbcs cbcu cbfb cbfc cbir cbsc cbsi cbus ccbc cccb cccc cccf ccci cccs cccu ccfc ccff ccfi ccic ccii ccir ccis ccob ccoc ccrc ccrf ccri ccrs ccsf ccsi ccss ccuc ccus cfbc cfbr cfbs cfcb cfcf cfco cfcs cffb cffr cfor cfos cfrb cfsi cibc cibi cibo cicc cici cico cicr cics cicu ciff cifs ciii ciis ciob cior cios cirb circ ciri ciro cirr cirs cis- cisc cisr ciss ciuc cius cobb cobi cobo cobs cobu coco cocu cofc coff cofi cofs coif coir cois coob coof coos cor- corb corc corf cori coro corr cors cosc cosi coso coss coub cour cous crbc crbu crcc crcr crfc crfs crib cric crif cris criu crob croc croo cror crss crub crus csbf cscb cscc cscf csci csco cscr cscs csfc csfr csib csio csir csis csob csor csos csrc csrs cssr csuf csur csus cub- cubb cubi cubs cucc cuci cufc cuff cufi cufo cui- cuif cuir cuis curb curf curi curo curr curs cusb cuso cuss cusu fbis fbrs fbus fcbs fccf fcic fcii fcsc ffcc ffff ffii ffrr ffss fibs ficc fico fics fifc fiff fifi fifo fiii fior fios firs fisc fisi fiss fisu fobs foci foco focs fofo fois foof foos for- forb fori foro forr fors fosb fosi foso foss four fous frbc frcc frfc frib fric frio fris frob fros frou frsb frsc frso frub fscb fscc fsfi fsfo fssc fssf fubb fubs fubu fuc- fuci fufc fuff fufu fuir fuor fur- furi furo furr furs fusc fusi fuso fuss fusu ibcs ibfi ibis ibos ibrc ibri ibro ibsf ibss ibus icbc icbs iccb iccc iccf icci icco iccr iccs iccu icfb icis icoc icor icos icrc icrf icrr icrs icru icsb icsc icsi icsr icss icub icus ifbb ifco ific ifis ifor ifrb ifrf ifri ifsb ifsc ifso iiii iiio iiis iioi iioo iios iirc iirs iisc iisi iisr iisu iiuc iobi ioci iofc ioii ioio ioof iooi iooo ioos iori iors ioso iosu ious ircc ircs ircu