b-u bbb bbk bbo bbr bbt bbu bkb bkk bko bkr bkt bob bok boo bor bot bou boz brb brk bro brr brt bru brz btb btk bto btr btt btu btz bub buk buo bur but buu buz bzo bzr bzu bzz k-t k-z kbb kbk kbo kbr kbu kbz kkb kkk kkr kkt kku kob kok koo kor kot kou koz krk kro krr krt kru ktb ktk kto ktr ktt ktu kub kuk kur kut kuu kzo 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 orz ot- otb otk oto otr ott otu otz ou- ouk ouo our out ozo ozt ozu ozz rbb rbk rbo rbr rbt rbu rkb rkk rko rkt rku rkz rob rok roo ror rot rou roz rrb rrk rrr rrt rru rtb rtk rto rtr rtt rtu rtz rub ruk ruo rur rut ruu ruz rzb rzo tbb tbk tbo tbr tbt tbu tbz tkb tkk tko tkr tkt tkz to- tob tok too tor tot tou toz trb trk tro trr trt tru trz ttb ttk tto ttr ttt ttu tub tuk tuo tur tut tuu tuz tzu ubb ubk ubo ubr ubt ubu ukb ukk ukr uku ukz uob uok uoo uor uot ur- urb urk uro urr urt uru urz utb utk uto utr utt utu utz uur uut uuu uzb uzo uzu zbb zbr zbt zo- zob zok zoo zor zot zou zro ztr zub zuk zur zut zuz zzr zzt zzz

bbbb bobb bobo bobu boko boku boob book boor boot booz bor- bork boro borr bort boru borz botb boto bott bouk bour bout bozo brkb brob brok broo bror brot brou broz brrr brut bruz btob btor btrt bttb bubb bubo bubu bukk buko buku bur- burb burk buro burr burt buru burz but- buto butt butz buuz buzz bzou bzrk bzzt bzzz kbbb kbbk kbbo kbbr kbbt kbbu kbbz kbkb kbkk kbko kbkr kbkz kbob kbok kboo kbot kboz kbrb kbrk kbro kbrt kbru kbrz kbtb kbtk kbto kbtr kbtt kbtz kbub kbuk kbur kbut kbuu kbuz kbzo kbzt kbzu kbzz kkbb kkbo kkbr kkbt kkbz kkkk kkob kkoo kkor kkot kkoz kkrb kkrk kkro kkrr kkrt kkrz kktk kktu kktz kkut kkuu kkzu kkzz kobb kobk kobo kobr kobu kokb kokk koko kokr koku kokz koob kook kooo koor koot koou kooz korb kork koro korr kort koru kotb kotk koto kotr kott kotu kotz koub kour kout kouu kozb kozk kozo kozr kozt kozu krbb krbk krbr krbt krbz krkk krko krkr krku krkz krob krok kroo kror kroz krrb krrk krro krrr krrt krrz krtk krto krtr krtz kruk krur kruz krzk krzr krzz ktbb ktbr ktbt ktbu ktbz ktkb ktkk ktko ktkr ktkt ktku ktkz ktob ktok ktoo ktor ktot ktrb ktrk ktro ktrr ktrt ktru ktrz kttk ktto kttr kttt kttu kttz ktub ktuz ktzk ktzo ktzr ktzt ktzu ktzz kubb kubo kubr kubu kukk kuku kuok kuoo kurb kurk kuro kurr kurt kuru kurz kuto kutr kutt kutu kutz kuub kuuk kuur kuuu kuuz kuzu kuzz kzbb kzbk kzbr kzbt kzbz kzkr kzkz kzoo kzor kzot kzoz kzrb kzrk kzro kzrr kzrz kztb kztk kzuu kzuz kzzb kzzk kzzo kzzr kzzt kzzz 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 oroz orro orto orub orzk orzo orzu oto- otok otoo otor otro otto ottu otur our- ouro ourt out- outb outo ouu- ouzo rbbb rbbr rob- robb robo robt robu rokk roko rokr roku roob rook roor root rooz rork roro rort roru rotk roto rotr rott roub rouk rout rouz rozz 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 tozo 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 tuzk tuzu tuzz tzuk tzur tzut tzzt ubbo ukko ukok ukur uor- uro- urok uroo uruk urur urut uruz utor utto uttu uuuu z-ro zobo zoku zoo- zook zoot zorb zork zoro zort zott zotz zouk zozo zozu zubo zubr zubu zuko zukr zuoz zurb zurr zuru zuuk zuzu zzzz

b-r-k bbook bo-bo bobko bobok bobr bokko bokok bokor booko bookz boort booru borbo borko borku boro- borok boroo borot borou borro bortz borut borzu botok botou botro bottu bouko bouto bozok bozoo brobo brook broto brouk brout brrrr bruzz btr-t bukk- bukor buroo buroz burro burru burtt buruk burut butko buto- butor butot butou butuo butut buzuk buzzr bzzzt k-rob k-t-b ko-ko kobru kobuk kobuz kokko kokor kokot kokou kokur kokut kooru korbo korku koror korro kortu koruk kotor kotto kottu kotur kouto kozub kroot krotz krout krtok kruto kubok kukko kukok kukur kurbu kurku kurtz kuruk kutob kuttu kutur kuzbu o-r-b oboro obout obrok obzor 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 ozoro ro-ro robbo robo- robor robot robrt robur rokkk rokot rokto rorbu rotko roto- rotor rotot rotto rotz rotzo 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 trooz 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 urroz urubu urutu urzut utro- utror uttur uturu ututo utzoo uuork uuuuu z-out zokor zorbo zorko zorro zotob zotto zrbtt zu-zu zubko zubuk zukor zzzzz

bbbbbb bobrok bokoro booboo boortz borbor borkou boroko bororo borzuk botoko botoro boubou boukou bourou boutob brokkr brotto brubru brutto bububu bukkur bukoto bukuru burbot burbur burkut burotu buruku burutu