bbb bbi bbk bbn bbr bbs bbt bi- bib bii bik bin bir bis bit bkb bkk bkn bkr bks bkt bnb bni bnk bnn bnr bns bnt brb bri brk brn brr brs brt bsb bsi bsk bsn bsr bss bst btb bti btk btn btr bts btt ibb ibi ibk ibn ibr ibs ibt iib iii iin iir iis iit ikb iki ikk ikr iks ikt in- inb ini ink inn inr ins int ir- irb iri irk irn irr irs irt is- isb isi isk isn isr iss ist itb iti itk itn its itt k-t kbb kbi kbk kbn kbr kbs kib kii kik kin kir kis kit kkb kki kkk kkn kkr kks kkt kn- kni knk knn knr knt kri krk krn krr krs krt ksb ksi ksk ksn ksr kss kst ktb ktk ktn ktr kts ktt n-i nbb nbi nbk nbn nbr nbs nbt nib nii nik nin nir nis nit nki nkk nkn nkr nks nkt nnb nni nnk nnn nns nnt nrb nri nrk nrn nrr nrs nrt nsb nsi nsk nsn nsr nss nst ntb nti ntk ntn ntr nts ntt rbb rbi rbk rbn rbr rbs rbt rib rii rik rin rir ris rit rkb rkk rks rkt rnb rni rnn rnr rns rnt rrb rri rrk rrn rrr rrs rrt rsb rsi rsk rsn rsr rss rst rtb rti rtk rtn rtr rts rtt sbb sbi sbk sbn sbr sbs sbt sib sii sik sin sir sis sit sk- skb ski skk skr sks skt snb sni snk snn snr sns snt sr- srb sri srk srn srr srs srt ss- ssb ssi ssk ssn ssr sss sst stb sti stk stn str sts stt tbb tbi tbk tbn tbr tbs tbt tib tii tik tin tir tis tit tkb tkk tkr tks tkt tnb tni tnk tnn tnr tns tnt trb tri trk trn trr trs trt tsb tsi tsk tsn tsr tss tst ttb tti ttk ttn ttr tts ttt