bbb bbi bbk bbo bbr bbs bbt bby bi- bib bii bik bio bir bis bit biv biy bkb bkk bko bkr bks bkt bkv bob boi bok boo bor bos bot bov boy brb bri brk bro brr brs brt brv bry bsb bsi bsk bso bsr bss bst bsv bsy btb bti btk bto btr bts btt btv bty bvb bvi bvk bvo bvr bvs bvt bvv by- byi byk byo byr bys byt i-v ibb ibi ibk ibo ibr ibs ibt ibv iby 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 iry is- isb isi isk iso isr iss ist isv isy itb iti itk ito its itt itv ity ivb ivi ivo ivr ivs ivt ivv ivy iyo iyr iys iyt iyy k-t kbb kbi kbk kbo kbr kbs kib kii kik kio kir kis kit kiv kkb kki kkk kkr kks kkt kkv kky kob koi kok koo kor kos kot koy kri krk kro krr krs krt krv kry ksb ksi ksk kso ksr kss kst ksv ktb ktk kto ktr kts ktt ktv kvb kvi kvk kvo kvr kvs kvv kyo kyr kys kyt o-i ob- obb obi obk obo obr obs obt obv oby 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 ory os- osb osi osk oso osr oss ost osv ot- otb oti otk oto otr ots ott otv ov- ovb ovi ovo ovs ovv oyi oyo oys rbb rbi rbk rbo rbr rbs rbt rib rii rik rio rir ris rit riv riy rkb rkk rko rks rkt rkv rky rob roi rok roo ror ros rot rov roy rrb rri rrk rrr rrs rrt rsb rsi rsk rso rsr rss rst rsv rtb rti rtk rto rtr rts rtt rtv rty rvb rvi rvo rvr rvs rvt rvv rvy ry- ryk ryo ryr rys ryy sbb sbi sbk sbo sbr sbs sbt sbv sby sib sii sik sio sir sis sit siv sk- skb ski skk sko skr sks skt sky sob soi sok soo sor sos sot sov soy sr- srb sri srk sro srr srs srt srv sry ss- ssb ssi ssk sso ssr sss sst ssv stb sti stk sto str sts stt stv sty svb svi svk svo svr svs svt svv svy sy- syb syi syk syr sys syt tbb tbi tbk tbo tbr tbs tbt tbv tib tii tik tio tir tis tit tiv tiy tkb tkk tko tkr tks tkt tky to- tob toi tok too tor tos tot tov toy trb tri trk tro trr trs trt trv try tsb tsi tsk tso tsr tss tst tsv tsy ttb tti ttk tto ttr tts ttt ttv tty tvb tvi tvk tvo tvr tvs tvt tvy tyo tyr tys tyt vbi vbk vbo vbr vbs vbv vi- vib vii vik vio vir vis vit viv viy vkb vkt vob voi vok voo vor vos vot vov voy vrb vri vrk vrr vrs vrt vry vsb vsi vsk vso vsr vss vst vsv vtb vti vtk vto vtr vts vtt vtv vty vvb vvi vvo vvr vvs vvt vvv vyt ybi ybr ybs yby yii yio yir yis yit yki ykk yob yoi yok yoo yor yos yot yoy yro yrs yrt ysb ysi ysk yso ysr yss yst ysy ytk yto ytr yts ytt ytv yvi yvo yvr yvy yyb yys yyt yyy