b-u bbb bbi bbn bbr bbs bbt bbu bi- bib bii bin bir bis bit biu bnb bni bnn bnr bns bnt bnu brb bri brn brr brs brt bru bsb bsi bsn bsr bss bst bsu btb bti btn btr bts btt btu bub bui bun bur bus but buu ibb ibi ibn ibr ibs ibt ibu iib iii iin iir iis iit iiu in- inb ini inn inr ins int inu ir- irb iri irn irr irs irt iru is- isb isi isn isr iss ist isu itb iti itn its itt itu iu- iub iui iur ius iut n-i nbb nbi nbn nbr nbs nbt nbu nib nii nin nir nis nit niu nnb nni nnn nns nnt nnu nrb nri nrn nrr nrs nrt nru nsb nsi nsn nsr nss nst nsu ntb nti ntn ntr nts ntt ntu nub nui nun nur nus nut nuu rbb rbi rbn rbr rbs rbt rbu rib rii rin rir ris rit rnb rni rnn rnr rns rnt rnu rrb rri rrn rrr rrs rrt rru rsb rsi rsn rsr rss rst rsu rtb rti rtn rtr rts rtt rtu rub rui run rur rus rut ruu sbb sbi sbn sbr sbs sbt sbu sib sii sin sir sis sit siu snb sni snn snr sns snt snu sr- srb sri srn srr srs srt ss- ssb ssi ssn ssr sss sst ssu stb sti stn str sts stt stu sub sui sun sur sus sut suu tbb tbi tbn tbr tbs tbt tbu tib tii tin tir tis tit tiu tnb tni tnn tnr tns tnt trb tri trn trr trs trt tru tsb tsi tsn tsr tss tst tsu ttb tti ttn ttr tts ttt ttu tub tui tun tur tus tut tuu ubb ubi ubn ubr ubs ubt ubu uib uii uin uir uis uit uiu un- unb uni unn unr uns unt unu ur- urb uri urn urr urs urt uru usb usi usn usr uss ust usu utb uti utn utr uts utt utu uun uur uus uut uuu

bbbb bbbs bbin bibb bibi bibs biin biis bin- bini binn bins bint binu birb biri birn birr birs birt biru bis- biss bist bisu bits bitt bitu bnib bnin bnrr bnss brin bris brit brns brrr brrs brsb brsr brst brun brus brut bsin bsns bsts btrt btss bttb btus bubb bubi bubs bubu buin buir buis buit buiu bunb buni bunn buns bunt bunu bur- burb buri burn burr burs burt buru busi buss bust busu but- buti buts butt buus ibis ibns ibri ibsn ibss ibtb ibts ibus iiii iiis iiit iirs iisi iisr iist iisu iitr iitt inis init inni innr inns innu inri inrs inss inst insu inti intn intr ints intu inui inun inus iri- irin iris irri irrs irti irts irun irus isbn isbt isin isis isit isnt isri issi issr isss issu isti istr ists isus itbs itin itis itri itrs itsi itsu itur iuiu iuss iust n-ii nbti nibi nibs niir niit niiu nini nins nirs nirt niru nisi niss nist nisu nitb niti nitr nits niur nnit nnnn nnss nntn nrts nsin nsis nsnr nssb nssr nsss nsts nstu nsub ntis ntnu ntru ntsb ntss ntsu nttr ntui nubi nubs nuin nuit nunn nuns nunt nuri nurn nurr nurs nurt nuru nusi nuss nust nusu nuts nutt nutu rbbb rbbr rbbs rbis rbss rbst rib- ribs ribu riin riis rinn riri rirs risi riss rist risu riti rits ritt ritu rius rnbr rnin rnnt rnut rrrr rrun rsbi rsis rsnn rsnr rsts rstu rtns rtss rtts rubb rubi rubs rubu ruin ruis ruit runi runn runs runt ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruun s-ib s-ii sbbs sbsi sbst sbtn sbus sibi sibs sibu siit sini sinn sins sint sinu siri sirr sirs sirt siru sisi siss sist sisu sit- siti sitn sits sitt situ siui sius siut snib snir snit snns snrs sntr snub snur snus srib sris srni srnn srtr srub ssbn ssbr ssin ssis ssit ssns ssri ssrs sssb sssi ssss sstb ssts stbs stib stir stis stit stnn stnr stns stri strn strs stru stsi stss sttr stub stun stur stus stut sub- subb subi subs suin suir suis suit sun- sunb suni sunn suns sunt sunu sur- suri surn surr surs surt suru sus- susi suss sust susu suti sutu suus tbbs tbit tbrb tbst tibi tibs tibu tiit tiiu tini tinn tins tint tinu tirb tiri tirr tirs tiru tisb tisi tiss tist titi tits titt titu tnts tnut tri- trib trin tris trit trsi trst trtr trub trun trus trut truu tsin tsis tssi tssr tsst tsts tsui tsun ttbb ttss tttt tubb tubr tubs tubu tuin tuis tuit tuiu tunb tuni tunn tuns tunu turb turi turn turr turs turt turu tusi tuss tust tuti tuts tutt tutu ubbi ubii ubir ubis ubit uint uirr uist uits uni- unii unin unir unis unit unni unns unrs uns- unst untb unts unus unut urbi urbs urib urin uris uriu urni urns urri ursi urss ursu urts urun urur urus urut usbr usbs usin usis usnr usnu ussb ussr usss usst ussu ustb usti usts usui usun usus utin utis utri utti uttu uuni uuri uusi uuuu

-itis bbuss bibbs bibin bibis bibri bibus binit binns bints binub birin birni birns birrs birst birts birun birur bisin bitis bitit bitru bitti bitts bitun brini brinn brins brint brisb brisi briss brist brits britt brrrr bruin bruis bruit bruiu bruni brunn bruns brunt bruri bruss brust bruun bsins btr-t btstu buirn buist bunin bunts bunun bunus bunut burbs burin burn- burns burnt burri burrs burru burst burts burtt burun burus burut busin busir bussu busti busts busur busut busuu butin butis butit butts butut ibbur ibtin iiiii iiris iisir iitti iiuni inbin inini inits innis innit inniu innti inrun insin insrr instn instr insts insub intis inuit inurn inust inuus irbis irbit irinn iris- iriss