bbb bbg bbi bbk bbr bbs bbt bgb bgg bgi bgk bgr bgs bgt bi- bib big bii bik bir bis bit bkb bkg bkk bkr bks bkt brb brg bri brk brr brs brt bsb bsg bsi bsk bsr bss bst btb btg bti btk btr bts btt gbg gbi gbk gbr gbs gbt ggb ggg ggi ggr ggs ggt gib gig gii gik gir gis git gkb gks gkt grb grg gri grk grr grs grt gsb gsg gsi gsk gsr gss gst gtb gtg gti gtk gtr gts gtt ibb ibg ibi ibk ibr ibs ibt igb igg igi igk igr igs igt iib iii iir iis iit ikb iki ikk ikr iks ikt ir- irb irg iri irk irr irs irt is- isb isg isi isk isr iss ist itb itg iti itk its itt k-t kbb kbi kbk kbr kbs kgb kgi kgs kib kig kii kik kir kis kit kkb kki kkk kkr kks kkt krg kri krk krr krs krt ksb ksg ksi ksk ksr kss kst ktb ktg ktk ktr kts ktt rbb rbg rbi rbk rbr rbs rbt rgb rgg rgi rgk rgr rgs rgt rib rig rii rik rir ris rit rkb rkg rkk rks rkt rrb rrg rri rrk rrr rrs rrt rsb rsg rsi rsk rsr rss rst rtb rtg rti rtk rtr rts rtt sbb sbg sbi sbk sbr sbs sbt sgb sgg sgi sgk sgr sgs sgt sib sig sii sik sir sis sit sk- skb skg ski skk skr sks skt sr- srb srg sri srk srr srs srt ss- ssb ssg ssi ssk ssr sss sst stb stg sti stk str sts stt tbb tbg tbi tbk tbr tbs tbt tgb tgg tgi tgk tgr tgs tgt tib tig tii tik tir tis tit tkb tkg tkk tkr tks tkt trb trg tri trk trr trs trt tsb tsg tsi tsk tsr tss tst ttb ttg tti ttk ttr tts ttt