b-u bbb bbf bbi bbo bbr bbs bbt bbu bfb bff bfi bfo bfr bfs bft bfu bi- bib bif bii bio bir bis bit biu bob bof boi boo bor bos bot bou brb brf bri bro brr brs brt bru bsb bsf bsi bso bsr bss bst bsu btb btf bti bto btr bts btt btu bub buf bui buo bur bus but buu fbb fbf fbi fbo fbr fbs fbt fbu fff ffi ffo ffr ffs fft ffu fib fif fii fir fis fit fiu fob fof foi foo for fos fot fou frb frf fri fro frr frs frt fru fsb fsf fsi fso fsr fss fst fsu ftb ftf fti fto ftr fts ftt ftu fub fuf fui fuo fur fus fut fuu i-f ibb ibf ibi ibo ibr ibs ibt ibu ifb iff ifi ifo ifr ifs ift ifu iib iif iii iio iir iis iit iiu io- iob iof ioi ioo ior ios iot iou ir- irb irf iri iro irr irs irt iru is- isb isf isi iso isr iss ist isu itb itf iti ito its itt itu iu- iub iui iur ius iut o-i ob- obb obf obi obo obr obs obt obu of- ofb off ofi ofo ofr ofs oft ofu oib oif oii oio oir ois oit oiu oo- oob oof ooi ooo oor oos oot or- orb orf ori oro orr ors ort oru os- osb osf osi oso osr oss ost osu ot- otb otf oti oto otr ots ott otu ou- ouf oui ouo our ous out rbb rbf rbi rbo rbr rbs rbt rbu rfb rff rfi rfo rfr rfs rft rfu rib rif rii rio rir ris rit rob rof roi roo ror ros rot rou rrb rrf rri rrr rrs rrt rru rsb rsf rsi rso rsr rss rst rsu rtb rtf rti rto rtr rts rtt rtu rub ruf rui ruo rur rus rut ruu sbb sbf sbi sbo sbr sbs sbt sbu sfb sff sfi sfo sfr sfs sft sfu sib sif sii sio sir sis sit siu sob sof soi soo sor sos sot sou sr- srb srf sri sro srr srs srt ss- ssb ssf ssi sso ssr sss sst ssu stb stf sti sto str sts stt stu sub suf sui suo sur sus sut suu tbb tbf tbi tbo tbr tbs tbt tbu tfb tff tfi tfo tfr tfs tft tfu tib tif tii tio tir tis tit tiu to- tob tof toi too tor tos tot tou trb trf tri tro trr trs trt tru tsb tsf tsi tso tsr tss tst tsu ttb ttf tti tto ttr tts ttt ttu tub tuf tui tuo tur tus tut tuu ubb ubf ubi ubo ubr ubs ubt ubu uff ufi ufo ufr ufs uft ufu uib uif uii uio uir uis uit uiu uob uoo uor uos uot ur- urb urf uri uro urr urs urt uru usb usf usi uso usr uss ust usu utb utf uti uto utr uts utt utu uur uus uut uuu

-ous bbbb bbbs bffs bfsi bfsr bfts bftt bibb bibi bibo bibs biff bifi biis bio- bioi bios biot biou birb biri biro birr birs birt biru bis- biso biss bist bisu bito bits bitt bitu bobb bobi bobo bobs bobu boff bofs bofu boi- boii bois boit boiu boob boof boor boos boot bor- borf bori boro borr bors bort boru bosi boso boss bost bosu botb boti boto bots bott bouf bour bous bout brfu brio bris brit brob broo bror bros brot brou brrr brrs brsb brsr brst brus brut bsff bsfs bsos bsts btob btor btrt btss bttb btus bubb bubi bubo bubs bubu buff bufo bufr buif buir buis buit buiu bur- burb buri buro burr burs burt buru busi buss bust busu but- buti buto buts butt buus fbis fbrs fbus ffff ffii ffrr ffss fftf fibs fiff fifi fifo fift fiii fior fios firs fisi fiss fist fisu fiti fits fitt fobs fobt fofo fois foof foos foot for- forb fori foro forr fors fort fosb fosi foso foss fost foti foto fots fott four fous fout frib frio fris frit frob fros frot frou frsb frso frst frub fsfi fsfo fssf ftii ftos ftrs ftsr ftub fubb fubs fubu fuff fufu fuir fuit fuor fur- furi furo furr furs furt fusi fuso fuss fust fusu futi futo futs futu ibfi ibis ibos ibot ibri ibro ibsf ibss ibtb ibts ibus ifbb ifis ifit ifor ifrb ifrf ifri ifsb ifso ifto iiii iiio iiis iiit iioi iioo iios iirs iisi iisr iist iisu iitr iitt iobi ioii ioio ioit ioof iooi iooo ioos iori iors ioso iosu iotf ioto ious irfu iri- irio iris irob irri irrs irsf irtf irti irts irus isbt isis isit iso- isof isor isos isri issf issi isso issr isss issu isti isto istr ists isus itbs itif itis itof itoi itoo itor itos itou itrf itri itrs itsf itsi itso itsu ittf itto itur iuiu iuss iust obbo obis obit oboi obor obos obot obri obro obsr obss obst obts obus off- offo offr offs offu ofit ofor ofst ofus oiii oios oirt oist oisu oiti oobi ooff oofs oooo ooos oort oosi oost ootb oots oous orbb orbi orbo orbs orbu orff orfi orfs orfu ori- orif orio oris orit oro- orof oror oros orot orri orro orrs orsi orso orsu orto orts orub orus osii osis osoi osoo osor osos osro ossb ossi osso ossu osti ostr osts otbs otif otis otit oto- otof otoo otor otos otro otrs otso otsu otti otto otts ottu otur otus oubs ouff ouii ouir ouis ouit our- ouro ours ourt oust out- outb outi outo outs ouu- rbbb rbbr rbbs rbis rbss rbst rib- ribo ribs ribu riff rifs rift rifu riif riis rios riot riou riri rirs risi riso riss rist risu riti rito rits ritt ritu rius rob- robb robi robo robs robt robu roff