b-u bbb bbk bbo bbr bbt bbu bkb bkk bko bkr bkt bob bok boo bor bot bou brb brk bro brr brt bru btb btk bto btr btt btu bub buk buo bur but buu k-t kbb kbk kbo kbr kbu kkb kkk kkr kkt kku kob kok koo kor kot kou krk kro krr krt kru ktb ktk kto ktr ktt ktu kub kuk kur kut kuu ob- obb obk obo obr obt obu okb okk oko okr oku oo- oob ook ooo oor oot or- orb ork oro orr ort oru ot- otb otk oto otr ott otu ou- ouk ouo our out rbb rbk rbo rbr rbt rbu rkb rkk rko rkt rku rob rok roo ror rot rou rrb rrk rrr rrt rru rtb rtk rto rtr rtt rtu rub ruk ruo rur rut ruu tbb tbk tbo tbr tbt tbu tkb tkk tko tkr tkt to- tob tok too tor tot tou trb trk tro trr trt tru ttb ttk tto ttr ttt ttu tub tuk tuo tur tut tuu ubb ubk ubo ubr ubt ubu ukb ukk ukr uku uob uok uoo uor uot ur- urb urk uro urr urt uru utb utk uto utr utt utu uur uut uuu

bbbb bobb bobo bobu boko boku boob book boor boot bor- bork boro borr bort boru botb boto bott bouk bour bout brkb brob brok broo bror brot brou brrr brut btob btor btrt bttb bubb bubo bubu bukk buko buku bur- burb burk buro burr burt buru but- buto butt kbbb kbbk kbbo kbbr kbbt kbbu kbkb kbkk kbko kbkr kbob kbok kboo kbot kbrb kbrk kbro kbrt kbru kbtb kbtk kbto kbtr kbtt kbub kbuk kbur kbut kbuu kkbb kkbo kkbr kkbt kkkk kkob kkoo kkor kkot kkrb kkrk kkro kkrr kkrt kktk kktu kkut kkuu kobb kobk kobo kobr kobu kokb kokk koko kokr koku koob kook kooo koor koot koou korb kork koro korr kort koru kotb kotk koto kotr kott kotu koub kour kout kouu krbb krbk krbr krbt krkk krko krkr krku krob krok kroo kror krrb krrk krro krrr krrt krtk krto krtr kruk krur ktbb ktbr ktbt ktbu ktkb ktkk ktko ktkr ktkt ktku ktob ktok ktoo ktor ktot ktrb ktrk ktro ktrr ktrt ktru kttk ktto kttr kttt kttu ktub kubb kubo kubr kubu kukk kuku kuok kuoo kurb kurk kuro kurr kurt kuru kuto kutr kutt kutu kuub kuuk kuur kuuu obbo obkb obok obor obot obro okko okok okor okot okro okto okur ooku oooo oort ootb orbb orbo orbu orko oro- orok oror orot orro orto orub oto- otok otoo otor otro otto ottu otur our- ouro ourt out- outb outo ouu- rbbb rbbr rob- robb robo robt robu rokk roko rokr roku roob rook roor root rork roro rort roru rotk roto rotr rott roub rouk rout rrrr rubb rubu rukk ruku ruok ruro ruru ruto rutt rutu tbrb tobo tobt tobu toko toku took toor toot tork toro torr tort toru toto totr tott touk tour tout troo trot trou trtr trub truk trut truu ttbb tttt tubb tubo tubr tubu tuko tuor turb turk turo turr turt turu tuto tutt tutu tuuo ubbo ukko ukok ukur uor- uro- urok uroo uruk urur urut utor utto uttu uuuu

b-r-k bbook bo-bo bobko bobok bobr bokko bokok bokor booko boort booru borbo borko borku boro- borok boroo borot borou borro borut botok botou botro bottu bouko bouto brobo brook broto brouk brout brrrr btr-t bukk- bukor buroo burro burru burtt buruk burut butko buto- butor butot butou butuo butut k-rob k-t-b ko-ko kobru kobuk kokko kokor kokot kokou kokur kokut kooru korbo korku koror korro kortu koruk kotor kotto kottu kotur kouto kroot krout krtok kruto kubok kukko kukok kukur kurbu kurku kuruk kutob kuttu kutur o-r-b oboro obout obrok okbut okkur okobo okoro okrut okubo okuku okuru ooooo orbot orkut orobo orout ortok ortoo oruku oruro orutu otoku ototo otour otrok ottur oubut ouoro outro outto ro-ro robbo robo- robor robot robrt robur rokkk rokot rokto rorbu rotko roto- rotor rotot rotto roubt rouko routt rt-rk rubor ruutu tbtbt tbutt tobor tobot tobou tokko toko- tokor tokuo tokur torob torok torro torto tortu toto- totok totoo touro trbuk trott trout trubu truro ttttt tubo- tubou tukur tuotu turbo turbt turko turku turok turot turro turtu turut tutku tutor tutto tuuru ubobo ukobu urkut uroob urour urubu urutu utro- utror uttur uturu ututo uuork uuuuu

bbbbbb bobrok bokoro booboo borbor borkou boroko bororo botoko botoro boubou boukou bourou boutob brokkr brotto brubru brutto bububu bukkur bukoto bukuru burbot burbur burkut burotu buruku burutu butbro buttto buutuo kkoktu koboko kokoku kokoro kokott kokubo kookoo kootoo koottu korbut korkor korkut kororo korubo koruru kotoko kottur kotuku koubou koukou kouoro kourou kourtt koutou kuroko kurort kururu obturb ookroo oooooo orrour ottoor outour outtro roboto rokkor rokuko rokuro rotork rotour rotout rotrou routot rubbot rubout rubro- rubutu rukutu rurutu rutour tkoutt toboot tobruk tokuko tokuro tookto tootoo tororo tortor tortou totoro totrot tourou toutou toutuo trokut trotro tuktuk tuotuo turbo- turbot turko- turtuk turtur tururu tutour tuttut u-boot utkoor utroor utukku utukur

bbbbbbb bok-bok boo-boo boobook bootout borotou boukout bourout bourrou boutoko brokour buttout kobroor kokorou kor-kor korkoro kottoor kotturu kuttoor oktrout oroboro otokutu ottrott outboob outbutt outroot rootout rootrot rub-out rubbour tokobot too-too tookout torbook tortour tototoo touboro toukoro toukoto tro-tro trotout trubrot tuk-tuk turbott tut-tut ububboo

bbbbbbbb bo-bo-bo borututu broubrou buruburu burukutu kobukuro kokborok kukukuku kukuruku kuruburu kurukuru out-book roboturb rokkurro tokotoko toottoot torbrook torotoro tourbook tourtour tukutuku turkbuku turturro ubbubboo

borborbor koukourou tuko-tuko tuku-tuku tuotuorou tuttototo

brooktrout kotukutuku kouroukoro kouroukoto kukkurukuu touroukoro tutortrout

borotou-koro

bbbbbbbbbbbbbbb