bbb bbg bbi bbk bbo bbr bbs bbt bgb bgg bgi bgk bgo bgr bgs bgt bi- bib big bii bik bio bir bis bit bkb bkg bkk bko bkr bks bkt bob bog boi bok boo bor bos bot brb brg bri brk bro brr brs brt bsb bsg bsi bsk bso bsr bss bst btb btg bti btk bto btr bts btt gbg gbi gbk gbo gbr gbs gbt ggb ggg ggi ggo ggr ggs ggt gib gig gii gik gio gir gis git gkb gko gks gkt gob gog goi gok goo gor gos got grb grg gri grk gro grr grs grt gsb gsg gsi gsk gso gsr gss gst gtb gtg gti gtk gto gtr gts gtt ibb ibg ibi ibk ibo ibr ibs ibt igb igg igi igk igo igr igs igt iib iii iio iir iis iit ikb iki ikk iko ikr iks ikt io- iob iog ioi ioo ior ios iot ir- irb irg iri irk iro irr irs irt is- isb isg isi isk iso isr iss ist itb itg iti itk ito its itt k-t kbb kbi kbk kbo kbr kbs kgb kgi kgo kgs kib kig kii kik kio kir kis kit kkb kki kkk kkr kks kkt kob kog koi kok koo kor kos kot krg kri krk kro krr krs krt ksb ksg ksi ksk kso ksr kss kst ktb ktg ktk kto ktr kts ktt o-i ob- obb obg obi obk obo obr obs obt ogg ogi ogo ogs ogt oib oii oik oio oir ois oit okb okg oki okk oko okr oks oo- oob oog ooi ook ooo oor oos oot or- orb org ori ork oro orr ors ort os- osb osg osi osk oso osr oss ost ot- otb otg oti otk oto otr ots ott rbb rbg rbi rbk rbo rbr rbs rbt rgb rgg rgi rgk rgo rgr rgs rgt rib rig rii rik rio rir ris rit rkb rkg rkk rko rks rkt rob rog roi rok roo ror ros rot rrb rrg rri rrk rrr rrs rrt rsb rsg rsi rsk rso rsr rss rst rtb rtg rti rtk rto rtr rts rtt sbb sbg sbi sbk sbo sbr sbs sbt sgb sgg sgi sgk sgo sgr sgs sgt sib sig sii sik sio sir sis sit sk- skb skg ski skk sko skr sks skt sob sog soi sok soo sor sos sot sr- srb srg sri srk sro srr srs srt ss- ssb ssg ssi ssk sso ssr sss sst stb stg sti stk sto str sts stt tbb tbg tbi tbk tbo tbr tbs tbt tgb tgg tgi tgk tgo tgr tgs tgt tib tig tii tik tio tir tis tit tkb tkg tkk tko tkr tks tkt to- tob tog toi tok too tor tos tot trb trg tri trk tro trr trs trt tsb tsg tsi tsk tso tsr tss tst ttb ttg tti ttk tto ttr tts ttt