b-u bbb bbd bbf bbi bbr bbs bbu bdb bdd bdf bdi bdr bds bdu bfb bfd bff bfi bfr bfs bfu bi- bib bid bif bii bir bis biu brb brd brf bri brr brs bru bsb bsd bsf bsi bsr bss bsu bub bud buf bui bur bus buu dbb dbd dbf dbi dbr dbs dbu ddb ddd ddf ddi ddr dds ddu dfb dfd dff dfi dfr dfs dfu di- dib did dif dii dir dis diu drb drd dri drr drs dru dsb dsd dsf dsi dsr dss dsu dub dud duf dui dur dus fbb fbd fbf fbi fbr fbs fbu fdb fdd fdf fdi fdr fds fdu ffd fff ffi ffr ffs ffu fib fid fif fii fir fis fiu frb frd frf fri frr frs fru fsb fsd fsf fsi fsr fss fsu fub fud fuf fui fur fus fuu i-d i-f ibb ibd ibf ibi ibr ibs ibu idb idd idf idi idr ids idu ifb ifd iff ifi ifr ifs ifu iib iid iif iii iir iis iiu ir- irb ird irf iri irr irs iru is- isb isd isf isi isr iss isu iu- iub iud iui iur ius rbb rbd rbf rbi rbr rbs rbu rdb rdd rdf rdi rdr rds rdu rfb rfd rff rfi rfr rfs rfu rib rid rif rii rir ris rrb rrd rrf rri rrr rrs rru rsb rsd rsf rsi rsr rss rsu rub rud ruf rui rur rus ruu sbb sbd sbf sbi sbr sbs sbu sdb sdd sdf sdi sdr sds sdu sfb sfd sff sfi sfr sfs sfu sib sid sif sii sir sis siu sr- srb srd srf sri srr srs ss- ssb ssd ssf ssi ssr sss ssu sub sud suf sui sur sus suu ubb ubf ubi ubr ubs ubu udb udd udf udi udr uds udu ufd uff ufi ufr ufs ufu uib uid uif uii uir uis uiu ur- urb urd urf uri urr urs uru usb usd usf usi usr uss usu uur uus uuu

bbbb bbbs bbdd bd-r bdii bdsd bduf bffs bfsi bfsr bibb bibi bibs bidi bidr bids bidu biff bifi biis birb bird biri birr birs biru bis- bisd biss bisu brds brfu brid bris brrr brrs brsb brsr brud brus bsbd bsff bsfs bsrd bssd bubb bubi bubs bubu budb budd budi buds budu buff bufr buid buif buir buis buiu bur- burb burd buri burr burs buru busi buss busu buus dbfs dbrs dbss dbus dddd ddss ddub dfds dfrf dfri dibb dibs didi dids didu dif- diff difs diii diis dird dirr dirs dis- disd disi diss dius drib drif drrs drub drui drus druu dsdr dsif dsri dsrr dssi dub- dubb dubs dubu dudd duds dudu duff dufu duid duif duir duis duri duru dusi duur fbis fbrs fbsd fbus ffff ffii ffrr ffss fibs fidf fids fiff fifi fiii firs fisd fisi fiss fisu frib frid fris frsb frub fsfi fssf fubb fubs fubu fudd fudi fuff fufu fuid fuir fur- furi furr furs fusd fusi fuss fusu ibfi ibid ibis ibrd ibri ibsf ibss ibus idid idir idis idrf idsf idss idub idus ifbb ifid ifis ifrb ifrf ifri ifsb iiii iiis iirs iisd iisi iisr iisu irds irfu iri- irid iris irri irrs irsf irus isbd isdb isds isis isri issf issi issr isss issu isus iuds iuiu iusd iuss rbbb rbbr rbbs rbds rbis rbsd rbss rfdi rfds rfid rib- ribs ribu ridd ridi rids riff rifs rifu riif riis riri rirs risd risi riss risu rius rrif rrrr rsbi rsdd rsds rsid rsis rubb rubi rubs rubu rudd rudi ruds ruff ruid ruif ruis rurd ruri rurs ruru rusi russ rusu ruud s-ib s-ii sbbs sbds sbsd sbsi sbus sdds sdib sdif sdrs sdsf sdss sdsu sfss sfsu sibi sibs sibu sidd sidi sidr sids siff sifr sifu sirf siri sirr sirs siru sisd sisi siss sisu siui sius srfi srib sris srsd srub ssbr ssdd ssdf ssid ssis ssri ssrs sssb sssf sssi ssss sub- subb subd subi subs sudd sudi suds suf- suff sufi sufr sufs sufu suid suir suis sur- surd surf suri surr surs suru sus- susd susi suss susu suus ubbi ubid ubii ubir ubis ubud uddi udds udid udir udsd uirr uisd urbi urbs urds urdu urff urfi urib urif uris uriu urri ursi urss ursu urur urus usbr usbs usdf usds usfi usfs usif usis ussb ussf ussr usss ussu usui usus uuri uusi uuuu

bbuss bdubs bibbs bibis bibri bibus biddu bidri bidur biffi biffs bifid bifus birds birdu birrs birur bisfi bridi brids brifu brisb brisi briss brrrr brud- bruds bruff bruis bruiu bruri bruss bssid budds buddu budur buffi buffs buird burbs burdi burds burfi burri burrs burru burud burus busir bussu busur busuu d-bus ddddd dibri diddu didus diffs dirfi disir diss- disur dribs dridu driff driss drubs druid druri dubbi dubbs dubi dubus duffs dufur dufus durif duris dussi fbisd fibis fibr- fidus fissi friis friss fu-fu fubbs fubus fudds fuddu fuffs furir furrs furud furus fusi- fusus i-bid ibbur ibdis ibids iddfs idifu idris idrus if-- ifius iiiii iiris iisir irbid irbis irid- irids iris- iriss irisu irssi is-is isisi isrib issid issru issus issuu isuus ri-fi ribbi riffs riisu risus rsssf rubbi rubid rubis rubus rudds rudus ruffs rufi- rufus ruiru russi s-bus s-iii sibir sibiu sibsu sibur siddi sidis sidri sidus sifus siris siriu sirsi sirud sirur sisid sisis sissi sissu siudi siuri siuru siusi ssdrs sssrb sssss subbu subis subss subud sudds sudis sudur suffr suffs sufis sufri suibu suids surds surdu surfs surif surir suris surud surui surur surus susus suudu u-dub ubifs ubirr ubisi ubris uibis urbis urris ursid ursus urubu ururi urusi ususi uusis uuuuu

bbbbbb bibiri bibiru bidbid birdis biribi birrus bribir bribri brubru bububu budis budrus burbur burdis burdur burris bursid bururi busbud ddr-ii diii-d disbud disdub diuris druids drusus dubdub dubius dubris duffus durius durrus durusu fibrid fissi- frisii