b-u bbb bbi bbl bbr bbs bbu bi- bib bii bil bir bis biu blb bli bll blr bls blu brb bri brl brr brs bru bsb bsi bsl bsr bss bsu bub bui bul bur bus buu ibb ibi ibl ibr ibs ibu iib iii iil iir iis iiu il- ilb ili ill ilr ils ilu ir- irb iri irl irr irs iru is- isb isi isl isr iss isu iu- iub iui iur ius lbb lbi lbl lbr lbs lbu lib lii lil lir lis liu llb lli lll llr lls llu lrb lri lrr lrs lru lsb lsi lsl lsr lss lsu lub lui lul lur lus luu rbb rbi rbl rbr rbs rbu rib rii ril rir ris rli rll rlr rls rlu rrb rri rrl rrr rrs rru rsb rsi rsl rsr rss rsu rub rui rur rus ruu sbb sbi sbl sbr sbs sbu sib sii sil sir sis siu slb sli sll slr sls slu sr- srb sri srl srr srs ss- ssb ssi ssl ssr sss ssu sub sui sul sur sus suu ubb ubi ubl ubr ubs ubu uib uii uil uir uis uiu ulb uli ull ulr uls ulu ur- urb uri url urr urs uru usb usi usl usr uss usu uur uus uuu

bbbb bbbs bblb bbls bibb bibi bibl bibs biis bili bill bils bilu birb biri birl birr birs biru bis- bisl biss bisu blir blis blls blss blub blur blus bril bris brls brrr brrs brsb brsr brus bubb bubi bubs bubu buir buis buiu bulb buli bull buls bulu bur- burb buri burl burr burs buru busi buss busu buus ibis ibri ibss ibus iiii iiis iirs iisi iisr iisu ilir ilis ill- illi ills ilus iri- iril iris irlb irri irrs irul irus isbl isil isis isls isri issi issr isss issu isus iuiu iuss lblr lbrs libr libs libu liii liir liis lilb lili lill lils lilu liri lirl lirr lirs liru lisi liss lisu lius llbs llll lrrr ls-r lsbu lssr lubs luis luli lull lulu luri lurs lusi luss rbbb rbbr rbbs rbis rbsl rbss rib- ribs ribu riis rill rilu riri rirs risi riss risu rius rlls rrrr rsbi rsis rssl rubb rubi rubs rubu ruis rull ruri rurs ruru rusi russ rusu s-ib s-ii sbbs sbsi sbus sibi sibs sibu sil- sili sill sils silu siri sirr sirs siru sisi siss sisu siui sius sl-i slib slir slrs slsu slub slur srib sris srub ssbr ssis ssri ssrl ssrs sssb sssi ssss sub- subb subi subl subs suir suis sul- suli sull sulu sur- suri surr surs suru sus- susi suss susu suus ubbi ubii ubir ubis ubli ubls uirr ulli ullr ulul ulus urbi urbs urib uris uriu urls urri ursi urss ursu urur urus usbl usbr usbs usis uslu ussb ussr usss ussu usui usul usus uulu uuri uusi uuuu

bbuss bibbs bibis bibri bibus bilbi bili- bilis billi bills billu bilsi birls birrs birur bliss blubs blurb blurr blurs brill brisb brisi briss brrrr bruis bruiu brull bruri bruss bulb- bulbi bulbs bulis buliu bull- bulli bulls bulul bulus burbs burli burls burri burrs burru burus busir bussu busur busuu ibbur ibill iblis iiiii iiris iisir ilisu illui illus ilulu irbis irill iris- iriss irisu irssi is-is isbul isili isill isisi isrib issru issus issuu isuli isuus iuliu iulus libis libri libru libus liisi lilis liliu lilli lilus liril lirui lisis liss- lissu liuli llrrs lubur lulli lulls lulul lulus lusis lusus luuri ribbi riisu rills risus rubbi rubis rubus ruili ruiru rulli russi s-bus s-iii sibir sibiu sibli sibsu sibul sibur siili silli sills silur siris siriu sirsi sirur sisil sisis sisli sissi sissu siuri siuru siusi sliss slubs sluis slurb slurs sluss ssbul sssrb sssss subbu subis subli subss suibu sulis sulli sulls sulur sulus surbl surir suris surui surul surur surus susil susus ubirr ubisi ubris uibis ullur ululu uluru urbis urris ursus urubu uruli ururi urusi usuli ususi uusis uuuuu

bbbbbb bibiri bibiru biblis biblus bilbul biribi birrus bissli blublu blurbs bribir bribri brills brisil brubru bruill bububu bulbil bulbul bulbus bullir bullis bulusu burbur burris bururi ibilib ibliss isurus libbis libris librul libusb lilius lillis lilliu liluri liulis llubi lubiri lubuli lullus lurulu ribbis ribisi russus sbirri siiiii silili silius sillub siriri sirius sirris sirsir sisisi sisulu slubbi subisu suburb suburi sulili surili susulu susurr ubussu usiris ussuri

bbbbbbb bibulus billibi billiri bissibi bissill bissiri blissus bulbils bulbuls bulilis burrill burruss bursill buruuli busiris ilbisil isbliss lulibub lullubi sibilus sibiril silurus sssssss subsill suburbs suillus suiriri surilis susulus uriburu ursulus usurbil

bbbbbbbb bilbilis bilibili billi-bi birillus buruburu i-ii-iii ibisbill iblul-il illbliss siburius silisili sillibub sullibib sussurus susurrus

ibisbills issisisis rissillis rusibisir sisillius

bbbbbbbbbbbbbbb billsbillsbills

iiiiiiiiiiiiiiiis