b-u bbb bbi bbk bbo bbr bbs bbu bby bi- bib bii bik bio bir bis biu biy bkb bkk bko bkr bks bob boi bok boo bor bos bou boy brb bri brk bro brr brs bru bry bsb bsi bsk bso bsr bss bsu bsy bub bui buk buo bur bus buu buy by- byi byk byo byr bys byu ibb ibi ibk ibo ibr ibs ibu iby iib iii iio iir iis iiu ikb iki ikk iko ikr iks iku io- iob ioi ioo ior ios iou ir- irb iri irk iro irr irs iru iry is- isb isi isk iso isr iss isu isy iu- iub iui iur ius iyo iyr iys iyy kbb kbi kbk kbo kbr kbs kbu kib kii kik kio kir kis kiu kkb kki kkk kkr kks kku kky kob koi kok koo kor kos kou koy kri krk kro krr krs kru kry ksb ksi ksk kso ksr kss ksu kub kui kuk kur kus kuu kuy kyo kyr kys kyu o-i ob- obb obi obk obo obr obs obu oby oib oii oik oio oir ois oiu okb oki okk oko okr oks oku oo- oob ooi ook ooo oor oos or- orb ori ork oro orr ors oru ory os- osb osi osk oso osr oss osu ou- oui ouk ouo our ous oyi oyo oys rbb rbi rbk rbo rbr rbs rbu rib rii rik rio rir ris riy rkb rkk rko rks rku rky rob roi rok roo ror ros rou roy rrb rri rrk rrr rrs rru rsb rsi rsk rso rsr rss rsu rub rui ruk ruo rur rus ruu ruy ry- ryk ryo ryr rys ryu ryy sbb sbi sbk sbo sbr sbs sbu sby sib sii sik sio sir sis siu sk- skb ski skk sko skr sks sku sky sob soi sok soo sor sos sou soy sr- srb sri srk sro srr srs sry ss- ssb ssi ssk sso ssr sss ssu sub sui suk suo sur sus suu suy sy- syb syi syk syr sys syu ubb ubi ubk ubo ubr ubs ubu uby uib uii uio uir uis uiu ukb uki ukk ukr uku uob uok uoo uor uos ur- urb uri urk uro urr urs uru ury usb usi usk uso usr uss usu uur uus uuu uyi uyo uys uyu ybi ybr ybs yby yii yio yir yis yki ykk yob yoi yok yoo yor yos you yoy yro yrs yru ysb ysi ysk yso ysr yss ysu ysy yui yuk yuo yur yus yuu yuy yyb yys yyu yyy

-ous bbbb bbbs bboy bbyo bibb bibi bibo bibs biis biko biku bio- bioi bios biou birb biri birk biro birr birs biru biry bis- bisk biso biss bisu bisy biys bkry bobb bobi bobo bobs bobu boby boi- boii bois boiu boki boko boks boku boob book boor boos bor- bori bork boro borr bors boru bory bosi bosk boso boss bosu bouk bour bous bouy boyi boyo boys brik brio bris brkb brob brok broo bror bros brou brrr brrs brsb brsr brus bry- bryk bryo bsos bubb bubi bubo bubs bubu buik buir buis buiu buki bukk buko buku buky buoy bur- burb buri burk buro burr burs buru bury busi busk buss busu busy buus buyi buyo buys buyu byik byki byob byoi byos byrk bysb bysi byso byss bysy i-by ibis ibos ibri ibro ibss ibus ibuy ibyi iiii iiio iiis iioi iioo iios iirs iisi iisr iisu ikki ikko ikky ikoo ikri iksu ikuo iobi ioby ioii ioio ioko iooi iooo ioos iori iors ioso iosu ious irby iri- irio iris iriy irki irks irob irri irrs irus isis isko isku iso- isok isor isos isri issi isso issr isss issu issy isus isys iuiu iuss iyos k-os kbbb kbbi kbbk kbbo kbbr kbbs kbbu kbib kbik kbio kbis kbiu kbiy kbkb kbkk kbko kbkr kbky kbob kboi kbok kboo kbos kbrb kbri kbrk kbro kbru kbry kbsb kbsi kbsk kbso kbsr kbss kbsu kbsy kbub kbuk kbur kbus kbuu kbuy kbyb kbyi kbyo kbyr kbys kbyu kibb kibi kibo kibr kibs kibu kiby kiii kiik kiis kiiu kiki kikk kiko kikr kiku kioi kiok kioo kiou kirb kiri kirk kiro kirr kirs kiru kisi kisk kiso kisr kiss kisu kisy kiur kiuu kiyi kiyk kiys kiyu kkbb kkbi kkbo kkbr kkbs kkik kkkk kkob kkoo kkor kkoy kkrb kkrk kkro kkrr kkrs kksi kksr kkss kksu kkus kkuu kkys kkyy kobb kobi kobk kobo kobr kobs kobu koby koii koir kokb koki kokk koko kokr koks koku koky koob kooi kook kooo koor koos koou korb kori kork koro korr kors koru kos- kosb kosi koso kosr koss kosu kosy koub koui kour kous kouu koyo koyy krbb krbi krbk krbr krib krik krio kris krki krkk krko krkr krks krku krky krob kroi krok kroo kror kros kroy krrb krri krrk krro krrr krrs krry krsk krsr krss krsu krsy krui kruk krur kryk kryo kryy ksbi ksbr ksbs ksby ksib ksii ksik ksir ksis ksiy kskb kskk ksko kskr ksks ksku ksky ksob ksoi ksok ksoo ksor ksos ksou ksrb ksro ksrr ksrs ksry kssi ksso kssr ksss kssu ksub ksui ksuu ksyr ksyy kubb kubo kubr kubs kubu kuby kuik kuki kukk kuks kuku kuky kuok kuoo kuos kurb kuri kurk kuro kurr kurs kuru kury kusb kuso kusu kuub kuuk kuur kuuu kuyi kuyo kuyu kuyy kybb kybi kybo kybr kyby kyis kykk kykr kyks kyky kyok kyoo kyor kyos kyoy kyrk kyro kyrs kysk kysr kyuk kyur kyus kyuu kyyi kyyk kyyo kyys kyyy obbo obby obis obkb oboi obok obor obos oboy obri obro obsr obss obus oiii oiko oiks oios oiry oisu okby okir okko okok okor okro oksi okso okur okus okyo oobi ooby ooku ooky oooo ooos oory oosi oous orbb orbi orbo orbs orbu orby ori- orio oris orko oro- orok oror oros oroy orri orro orrs orry orsi