b-u bbb bbi bbk bbo bbr bbt bbu bi- bib bii bik bio bir bit biu biv bkb bkk bko bkr bkt bkv bob boi bok boo bor bot bou bov brb bri brk bro brr brt bru brv btb bti btk bto btr btt btu btv bub bui buk buo bur but buu bvb bvi bvk bvo bvr bvt bvu bvv i-v ibb ibi ibk ibo ibr ibt ibu ibv iib iii iio iir iit iiu ikb iki ikk iko ikr ikt iku ikv io- iob ioi ioo ior iot iou iov ir- irb iri irk iro irr irt iru irv itb iti itk ito itt itu itv iu- iub iui iur iut ivb ivi ivo ivr ivt ivu ivv k-t kbb kbi kbk kbo kbr kbu kib kii kik kio kir kit kiu kiv kkb kki kkk kkr kkt kku kkv kob koi kok koo kor kot kou kri krk kro krr krt kru krv ktb ktk kto ktr ktt ktu ktv kub kui kuk kur kut kuu kvb kvi kvk kvo kvr kvv o-i ob- obb obi obk obo obr obt obu obv oib oii oik oio oir oit oiu oiv okb oki okk oko okr oku oo- oob ooi ook ooo oor oot oov or- orb ori ork oro orr ort oru orv ot- otb oti otk oto otr ott otu otv ou- oui ouk ouo our out ov- ovb ovi ovo ovv rbb rbi rbk rbo rbr rbt rbu rib rii rik rio rir rit riv rkb rkk rko rkt rku rkv rob roi rok roo ror rot rou rov rrb rri rrk rrr rrt rru rtb rti rtk rto rtr rtt rtu rtv rub rui ruk ruo rur rut ruu ruv rvb rvi rvo rvr rvt rvu rvv tbb tbi tbk tbo tbr tbt tbu tbv tib tii tik tio tir tit tiu tiv tkb tkk tko tkr tkt to- tob toi tok too tor tot tou tov trb tri trk tro trr trt tru trv ttb tti ttk tto ttr ttt ttu ttv tub tui tuk tuo tur tut tuu tuv tvb tvi tvk tvo tvr tvt tvu ubb ubi ubk ubo ubr ubt ubu ubv uib uii uio uir uit uiu ukb uki ukk ukr uku uob uok uoo uor uot ur- urb uri urk uro urr urt uru utb uti utk uto utr utt utu utv uur uut uuu uvb uvo uvu uvv vbi vbk vbo vbr vbv vi- vib vii vik vio vir vit viu viv vkb vkt vob voi vok voo vor vot vou vov vrb vri vrk vrr vrt vru vtb vti vtk vto vtr vtt vtu vtv vuk vur vut vuv vvb vvi vvo vvr vvt vvv

bbbb bibb bibi bibo biko biku bio- bioi biot biou birb biri birk biro birr birt biru bito bitt bitu bivi bobb bobi bobo bobu boi- boii boit boiu boki boko boku boob book boor boot bor- bori bork boro borr bort boru botb boti boto bott bouk bour bout bovi bovo brik brio brit brkb brob brok broo bror brot brou brrr brut bruv brvi btob btor btrt bttb btvi bubb bubi bubo bubu buik buir buit buiu buki bukk buko buku bur- burb buri burk buro burr burt buru but- buti buto butt ibot ibri ibro ibtb iiii iiio iiit iioi iioo iitr iitt ikki ikko ikoo ikri ikuo iobi ioii ioio ioit ioko iooi iooo iori ioto iri- irio irki irob irov irri irti itko itoi itoo itor itou itri itto itur iuiu ivbv ivor kbbb kbbi kbbk kbbo kbbr kbbt kbbu kbib kbik kbio kbit kbiu kbkb kbkk kbko kbkr kbkv kbob kboi kbok kboo kbot kbov kbrb kbri kbrk kbro kbrt kbru kbrv kbtb kbtk kbto kbtr kbtt kbtv kbub kbuk kbur kbut kbuu kbvb kbvo kbvr kbvu kibb kibi kibo kibr kibt kibu kiii kiik kiit kiiu kiki kikk kiko kikr kikt kiku kioi kiok kioo kiot kiou kirb kiri kirk kiro kirr kirt kiru kirv kiti kito kitr kitt kitu kitv kiur kiuu kivi kivu kkbb kkbi kkbo kkbr kkbt kkik kkit kkkk kkob kkoo kkor kkot kkov kkrb kkrk kkro kkrr kkrt kkrv kktk kktu kktv kkut kkuu kkvr kkvt kkvu kkvv kobb kobi kobk kobo kobr kobu koii koir koit koiv kokb koki kokk koko kokr koku koob kooi kook kooo koor koot koou koov korb kori kork koro korr kort koru korv kotb koti kotk koto kotr kott kotu kotv koub koui kour kout kouu kovi kovk kovo kovr krbb krbi krbk krbr krbt krib krik krio krit kriv krki krkk krko krkr krku krkv krob kroi krok kroo kror krov krrb krri krrk krro krrr krrt krti krtk krto krtr krtv krui kruk krur krvb krvi krvk krvo krvr krvv ktbb ktbr ktbt ktbu ktib ktik ktiv ktkb ktkk ktko ktkr ktkt ktku ktob ktok ktoo ktor ktot ktrb ktri ktrk ktro ktrr ktrt ktru ktrv ktti kttk ktto kttr kttt kttu kttv ktub ktui ktuv ktvb ktvi ktvk ktvo ktvr ktvt ktvu kubb kubo kubr kubu kuik kuki kukk kuku kuok kuoo kurb kuri kurk kuro kurr kurt kuru kurv kuti kuto kutr kutt kutu kutv kuub kuuk kuur kuuu kuvi kuvo kuvr kvbr kvbt kvik kvir kvit kviv kvob kvoi kvok kvoo kvor kvot kvou kvov kvri kvro kvrr kvrv kvti kvtk kvto kvtr kvtt kvtv kvui kvuu kvvr kvvv obbo obit obkb oboi obok obor obot obri obro obvi oiii oiko oirt oiti okir okko okok okor okot okro okto okur oobi ooku oooo oort ootb orbb orbi orbo orbu ori- orio orit orko oro- orok oror orot orri orro orto orub orvr otit oto- otok otoo otor otov otro otti otto ottu otur ouii ouir ouit our- ouro ourt out- outb outi outo ouu- ovi- ovo- ovoo ovot rbbb rbbr rib- ribo ribu riki rikk riku riot riou riri riti rito ritt ritu rivo rob- robb robi robo robt robu roik roio roir roit roiu roki rokk roko rokr roku roob rooi rook roor root