bbb bbf bbi bbo bbr bbs bbt bfb bff bfi bfo bfr bfs bft bi- bib bif bii bio bir bis bit bob bof boi boo bor bos bot brb brf bri bro brr brs brt bsb bsf bsi bso bsr bss bst btb btf bti bto btr bts btt fbb fbf fbi fbo fbr fbs fbt fff ffi ffo ffr ffs fft fib fif fii fir fis fit fob fof foi foo for fos fot frb frf fri fro frr frs frt fsb fsf fsi fso fsr fss fst ftb ftf fti fto ftr fts ftt i-f ibb ibf ibi ibo ibr ibs ibt ifb iff ifi ifo ifr ifs ift iib iif iii iio iir iis iit io- iob iof ioi ioo ior ios iot ir- irb irf iri iro irr irs irt is- isb isf isi iso isr iss ist itb itf iti ito its itt o-i ob- obb obf obi obo obr obs obt of- ofb off ofi ofo ofr ofs oft oib oif oii oio oir ois oit oo- oob oof ooi ooo oor oos oot or- orb orf ori oro orr ors ort os- osb osf osi oso osr oss ost ot- otb otf oti oto otr ots ott rbb rbf rbi rbo rbr rbs rbt rfb rff rfi rfo rfr rfs rft rib rif rii rio rir ris rit rob rof roi roo ror ros rot rrb rrf rri rrr rrs rrt rsb rsf rsi rso rsr rss rst rtb rtf rti rto rtr rts rtt sbb sbf sbi sbo sbr sbs sbt sfb sff sfi sfo sfr sfs sft sib sif sii sio sir sis sit sob sof soi soo sor sos sot sr- srb srf sri sro srr srs srt ss- ssb ssf ssi sso ssr sss sst stb stf sti sto str sts stt tbb tbf tbi tbo tbr tbs tbt tfb tff tfi tfo tfr tfs tft tib tif tii tio tir tis tit to- tob tof toi too tor tos tot trb trf tri tro trr trs trt tsb tsf tsi tso tsr tss tst ttb ttf tti tto ttr tts ttt

bbbb bbbs bffs bfsi bfsr bfts bftt bibb bibi bibo bibs biff bifi biis bio- bioi bios biot birb biri biro birr birs birt bis- biso biss bist bito bits bitt bobb bobi bobo bobs boff bofs boi- boii bois boit boob boof boor boos boot bor- borf bori boro borr bors bort bosi boso boss bost botb boti boto bots bott brio bris brit brob broo bror bros brot brrr brrs brsb brsr brst bsff bsfs bsos bsts btob btor btrt btss bttb fbis fbrs ffff ffii ffrr ffss fftf fibs fiff fifi fifo fift fiii fior fios firs fisi fiss fist 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 frib frio fris frit frob fros frot frsb frso frst fsfi fsfo fssf ftii ftos ftrs ftsr ibfi ibis ibos ibot ibri ibro ibsf ibss ibtb ibts ifbb ifis ifit ifor ifrb ifrf ifri ifsb ifso ifto iiii iiio iiis iiit iioi iioo iios iirs iisi iisr iist iitr iitt iobi ioii ioio ioit ioof iooi iooo ioos iori iors ioso iotf ioto iri- irio iris irob irri irrs irsf irtf irti irts isbt isis isit iso- isof isor isos isri issf issi isso issr isss isti isto istr ists itbs itif itis itof itoi itoo itor itos itrf itri itrs itsf itsi itso ittf itto obbo obis obit oboi obor obos obot obri obro obsr obss obst obts off- offo offr offs ofit ofor ofst oiii oios oirt oist oiti oobi ooff oofs oooo ooos oort oosi oost ootb oots orbb orbi orbo orbs orff orfi orfs ori- orif orio oris orit oro- orof oror oros orot orri orro orrs orsi orso orto orts osii osis osoi osoo osor osos osro ossb ossi osso osti ostr osts otbs otif otis otit oto- otof otoo otor otos otro otrs otso otti otto otts rbbb rbbr rbbs rbis rbss rbst rib- ribo ribs riff rifs rift riif riis rios riot riri rirs risi riso riss rist riti rito rits ritt rob- robb robi robo robs robt roff rofo roif roio roir rois roit roob roof rooi roor roos root rori roro rort rosi roso ross rost roti roto rotr rots rott rrif rrrr rsbi rsis rsos rsts rtbf rtfb rtss rtts s-ib s-ii s-os sbbs sbor sbot sbsi sbst sfio sfor sfos sfro sfss sfts sibi sibo sibs siff sifo sifr sift siit sior sios siot sirf siri siro sirr sirs sirt sisi siss sist sit- siti sito sits sitt sobo sobr sobs sobt sofi sofo soft soif soir sois soit soof soor soos soot sorb sori soro sorr sors sort sosi soso soss sost soto sots srfi srib sris sros srtr ssbr ssis ssit ssot ssri ssrs sssb sssf sssi ssss sstb ssts stbs stib stif stio stir stis stit stob stof stoo stor stos stot stri stro strs stsf stsi stss sttr tbbs tbit tbrb tbst tfot tfrs tfsi tfss tibi tibs tiff tifo tift tiit tios tirb tiri tiro tirr tirs tisb tisi tiso tiss tist titi tito tits titt tobi tobo tobs tobt toff tofi tofo toft tois toit toof toor toos toot torf tori toro torr tors tort tosb tosi toso toss tost toti toto totr tots tott trfr tri- trib trif trio tris trit troi troo tros trot trsi trst trtr tsis tsob tsoi tsos tssf tssi tssr tsst tsts ttbb ttff ttss tttt

-itis bibbo bibbs bibio bibis bibos bibri biffi biffo biffs bifor bioss biros birrs birst birts bisfi bisto bitis bitit bitof bitti bitto bitts bo-bo bobbi bobos bobr bobri bobst bobts boffi boffo boffs boios boiro boist boito boobs boofs booit boors boort boost boots borbo borio boris boro- boroo boros borot borro borsi borst borts bosio bosor bossi bosso botis botos botro botti botts briot brisb brisi