bbb bbi bbk bbo bbr bbs bbt bi- bib bii bik bio bir bis bit biv bkb bkk bko bkr bks bkt bkv bob boi bok boo bor bos bot bov brb bri brk bro brr brs brt brv bsb bsi bsk bso bsr bss bst bsv btb bti btk bto btr bts btt btv bvb bvi bvk bvo bvr bvs bvt bvv i-v ibb ibi ibk ibo ibr ibs ibt ibv iib iii iio iir iis iit ikb iki ikk iko ikr iks ikt ikv io- iob ioi ioo ior ios iot iov ir- irb iri irk iro irr irs irt irv is- isb isi isk iso isr iss ist isv itb iti itk ito its itt itv ivb ivi ivo ivr ivs ivt ivv k-t kbb kbi kbk kbo kbr kbs kib kii kik kio kir kis kit kiv kkb kki kkk kkr kks kkt kkv kob koi kok koo kor kos kot kri krk kro krr krs krt krv ksb ksi ksk kso ksr kss kst ksv ktb ktk kto ktr kts ktt ktv kvb kvi kvk kvo kvr kvs kvv o-i ob- obb obi obk obo obr obs obt obv oib oii oik oio oir ois oit oiv okb oki okk oko okr oks oo- oob ooi ook ooo oor oos oot oov or- orb ori ork oro orr ors ort orv os- osb osi osk oso osr oss ost osv ot- otb oti otk oto otr ots ott otv ov- ovb ovi ovo ovs ovv rbb rbi rbk rbo rbr rbs rbt rib rii rik rio rir ris rit riv rkb rkk rko rks rkt rkv rob roi rok roo ror ros rot rov rrb rri rrk rrr rrs rrt rsb rsi rsk rso rsr rss rst rsv rtb rti rtk rto rtr rts rtt rtv rvb rvi rvo rvr rvs rvt rvv sbb sbi sbk sbo sbr sbs sbt sbv sib sii sik sio sir sis sit siv sk- skb ski skk sko skr sks skt sob soi sok soo sor sos sot sov sr- srb sri srk sro srr srs srt srv ss- ssb ssi ssk sso ssr sss sst ssv stb sti stk sto str sts stt stv svb svi svk svo svr svs svt svv tbb tbi tbk tbo tbr tbs tbt tbv tib tii tik tio tir tis tit tiv tkb tkk tko tkr tks tkt to- tob toi tok too tor tos tot tov trb tri trk tro trr trs trt trv tsb tsi tsk tso tsr tss tst tsv ttb tti ttk tto ttr tts ttt ttv tvb tvi tvk tvo tvr tvs tvt vbi vbk vbo vbr vbs vbv vi- vib vii vik vio vir vis vit viv vkb vkt vob voi vok voo vor vos vot vov vrb vri vrk vrr vrs vrt vsb vsi vsk vso vsr vss vst vsv vtb vti vtk vto vtr vts vtt vtv vvb vvi vvo vvr vvs vvt vvv

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