-er bbb bbe bbi bbk bbl bbn bbr bbs bbt be- beb bee bei bek bel ben ber bes bet bi- bib bie bii bik bil bin bir bis bit bkb bke bkk bkl bkn bkr bks bkt blb ble bli blk bll bln blr bls blt bnb bne bni bnk bnl bnn bnr bns bnt brb bre bri brk brl brn brr brs brt bsb bse bsi bsk bsl bsn bsr bss bst btb bte bti btk btl btn btr bts btt ebb ebe ebi ebk ebl ebn ebr ebs ebt eeb eee eek eel een eer ees eet eib eie eii eik eil ein eir eis eit ekb eke eki ekl ekr eks ekt elb ele eli elk ell eln elr els elt en- enb ene eni enk enl enn enr ens ent erb ere eri erk erl ern err ers ert es- esb ese esi esk esl esn esr ess est etb ete eti etk etl etn etr ets ett ibb ibe ibi ibk ibl ibn ibr ibs ibt ie- iee iei iek iel ien ier ies iet iib iie iii iil iin iir iis iit ikb ike iki ikk ikl ikr iks ikt il- ilb ile ili ilk ill iln ilr ils ilt in- inb ine ini ink inl inn inr ins int ir- irb ire iri irk irl irn irr irs irt is- isb ise isi isk isl isn isr iss ist itb ite iti itk itl itn its itt k-t kbb kbe kbi kbk kbl kbn kbr kbs ke- keb kee kei kek kel ken ker kes ket kib kie kii kik kil kin kir kis kit kkb kke kki kkk kkl kkn kkr kks kkt kl- klb kli klr kls klt kn- kne kni knk knl knn knr knt kri krk krl krn krr krs krt ksb kse ksi ksk ksl ksn ksr kss kst ktb kte ktk ktl ktn ktr kts ktt lbb lbe lbi lbk lbl lbr lbs lbt leb lee lei lek lel len ler les let lib lie lii lik lil lin lir lis lit lkb lkl lkr lks lkt llb lle lli llk lll lln llr lls llt lnb lne lni lnk lnl lnn lnr lns lnt lrb lri lrk lrn lrr lrs lrt lsb lse lsi lsk lsl lsn lsr lss lst ltb lte lti ltk ltl ltr lts ltt n-i nbb nbe nbi nbk nbl nbn nbr nbs nbt ne- neb nee nei nek nel nen ner nes net nib nie nii nik nil nin nir nis nit nke nki nkk nkn nkr nks nkt nlb nle nli nlk nll nln nlr nls nlt nnb nne nni nnk nnl nnn nns nnt nrb nre nri nrk nrl nrn nrr nrs nrt nsb nse nsi nsk nsl nsn nsr nss nst ntb nte nti ntk ntn ntr nts ntt rbb rbe rbi rbk rbl rbn rbr rbs rbt re- reb ree rei rek rel ren rer res ret rib rie rii rik ril rin rir ris rit rkb rke rkk rks rkt rle rli rll rln rlr rls rlt rnb rni rnn rnr rns rnt rrb rri rrk rrl rrn rrr rrs rrt rsb rse rsi rsk rsl rsn rsr rss rst rtb rte rti rtk rtl rtn rtr rts rtt sbb sbe sbi sbk sbl sbn sbr sbs sbt se- seb see sei sek sel sen ser ses set sib sie sii sik sil sin sir sis sit sk- skb ske ski skk skl skr sks skt slb sle sli slk sll sln slr sls slt snb sne sni snk snl snn snr sns snt sr- srb sre sri srk srl srn srr srs srt ss- ssb sse ssi ssk ssl ssn ssr sss sst stb ste sti stk stl stn str sts stt tbb tbe tbi tbk tbl tbn tbr tbs tbt te- teb tee tei tek tel ten ter tes tet tib tie tii tik til tin tir tis tit tkb tke tkk tkl tkr tks tkt tle tli tlk tll tln tlr tls tlt tnb tne tni tnk tnl tnn tnr tns tnt trb tre tri trk trl trn trr trs trt tsb tse tsi tsk tsl tsn tsr tss tst ttb tte tti ttk ttl ttn ttr tts ttt