bbbb bbbs bibb bibi bibo bibs biis biko bio- bioi bios biot birb biri birk biro birr birs birt bis- bisk biso biss bist bito bits bitt bivi bobb bobi bobo bobs boi- boii bois boit boki boko boks boob book boor boos boot bor- bori bork boro borr bors bort bosi bosk boso boss bost botb boti boto bots bott bovi bovo brik brio bris brit brkb brob brok broo bror bros brot brrr brrs brsb brsr brst brvi bskt bsos bsts bstv btob btor btrt btss bttb btvi ibis ibos ibot ibri ibro ibss ibtb ibts iiii iiio iiis iiit iioi iioo iios iirs iisi iisr iist iitr iitt ikki ikko ikoo ikri iobi ioii ioio ioit ioko iooi iooo ioos iori iors ioso ioto iri- irio iris irki irks irob irov irri irrs irti irts irvs isbt isis isit isko iso- isok isor isos isri issi isso issr isss isti isto istr ists itbs itis itko itoi itoo itor itos itri itrs itsi itso itto ivbv ivor ivrs k-os kbbb kbbi kbbk kbbo kbbr kbbs kbbt kbib kbik kbio kbis kbit kbkb kbkk kbko kbkr kbkv kbob kboi kbok kboo kbos kbot kbov kbrb kbri kbrk kbro kbrt kbrv kbsb kbsi kbsk kbso kbsr kbss kbst kbsv kbtb kbtk kbto kbtr kbts kbtt kbtv kbvb kbvo kbvr kibb kibi kibo kibr kibs kibt kiii kiik kiis kiit kiki kikk kiko kikr kikt kioi kiok kioo kiot kirb kiri kirk kiro kirr kirs kirt kirv kisi kisk kiso kisr kiss kist kisv kiti kito kitr kits kitt kitv kivi kkbb kkbi kkbo kkbr kkbs kkbt kkik kkit kkkk kkob kkoo kkor kkot kkov kkrb kkrk kkro kkrr kkrs kkrt kkrv kksi kksr kkss kkst kktk kkts kktv kkvr kkvt kkvv kobb kobi kobk kobo kobr kobs koii koir koit koiv kokb koki kokk koko kokr koks koob kooi kook kooo koor koos koot koov korb kori kork koro korr kors kort korv kos- kosb kosi koso kosr koss kost kotb koti kotk koto kotr kots kott kotv kovi kovk kovo kovr krbb krbi krbk krbr krbt krib krik krio kris krit kriv krki krkk krko krkr krks krkv krob kroi krok kroo kror kros krov krrb krri krrk krro krrr krrs krrt krsk krsr krss krst krsv krti krtk krto krtr krts krtv krvb krvi krvk krvo krvr krvs krvv ksbi ksbr ksbs ksbv ksib ksii ksik ksir ksis ksit ksiv kskb kskk ksko kskr ksks ksob ksoi ksok ksoo ksor ksos ksrb ksro ksrr ksrs ksrt ksrv kssi ksso kssr ksss ksst kstb ksti kstk ksto kstr ksts kstt kstv ksvi ksvr ktbb ktbr ktbt ktib ktik ktis ktiv ktkb ktkk ktko ktkr ktks ktkt ktob ktok ktoo ktor ktot ktrb ktri ktrk ktro ktrr ktrs ktrt ktrv ktso ktsr ktst ktti kttk ktto kttr ktts kttt kttv ktvb ktvi ktvk ktvo ktvr ktvt kvbr kvbt kvik kvir kvis kvit kviv kvob kvoi kvok kvoo kvor kvot kvov kvri kvro kvrr kvrv kvsi kvso kvsr kvss kvst kvsv kvti kvtk kvto kvtr kvtt kvtv kvvr kvvs kvvv obbo obis obit obkb oboi obok obor obos obot obri obro obsr obss obst obts obvi obvs oiii oiko oiks oios oirt oist oiti okir okko okok okor okot okro oksi okso okto oobi oooo ooos oort oosi oost ootb oots orbb orbi orbo orbs ori- orio oris orit orko oro- orok oror oros orot orri orro orrs orsi orsk orso orto orts orvr orvs osii osik osis oski osoi osoo osor osos osov osro ossb ossi osso osti ostr osts otbs otis otit oto- otok otoo otor otos otov otro otrs otso otti otto otts ovi- ovis ovo- ovoo ovot rbbb rbbr rbbs rbis rbss rbst rib- ribo ribs riis riki rikk rios riot riri rirs risi risk riso riss rist riti rito rits ritt rivo rivs rkos rkss rksv rkts rob- robb robi robo robs robt roik roio roir rois roit roki rokk roko rokr roks roob rooi rook roor roos root rori rork roro rort rosi roso ross rost roti rotk roto rotr rots rott rovi rovo rovs rrrr rsbi rsis rsos rsts rtss rtts rtvi rvik s-ib s-ii s-iv s-os s-vt sbbs sbor sbot sbrk sbsi sbst sbtk sibi sibo sibs siik siit siki siko sikr siks sior sios siot siri sirk siro sirr sirs sirt sisi sisk siss sist sit- siti sito sits sitt sivi skik skio skir skis skit skiv skor skot skov skrt skss sobo sobr sobs sobt soik soir sois soit soki sokk soko sook soor soos soot sorb sori soro sorr sors sort sosi soso soss sost sosv sotk soto sots sovo sovs srib sris sros srtr srtv ssbr ssis ssit ssot ssri ssrs sssb sssi ssss sstb ssts st-v stbs stib stik stio stir stis stit stks stob stok stoo stor stos stot stri strk stro strs stsi stss sttr stvs svir svit svor svtr tbbs tbit tbrb tbst tbvi tibi tibs tiit tiki tiko tios tirb tiri tiro tirr tirs tisb tisi tiso tiss tist titi tito tits titt tivi tivo tkos tkts tobi tobo tobs tobt tois toit toki toko took toor toos toot tori tork toro torr tors tort torv tosb tosi tosk toso toss tost toti toto totr tots tott tovo tri- trib trik trio tris trit troi troo tros trot trsi trst trtr trvs tsis tsiv tsks tsob tsoi tsos tssi tssr tsst tsts tsvi ttbb ttss tttt tvbs tvis tvos tvri tvro tvrr tvss tvtv vibs viii viik viki viko vios virb viri virk viro virr virt visi visk viso viss vist viti vito vitt vivi vivo vkor voio voir vois voit voks voor voot vor- vori voro vors vort vosi voso voss voto vovk vrio vris vrot vrsi vrto vsto vt-i vtrs vvob vvsb vvvv