-er bbb bbe bbi bbk bbl bbm bbr bbs bbt be- beb bee bei bek bel bem ber bes bet bi- bib bie bii bik bil bim bir bis bit bkb bke bkk bkl bkm bkr bks bkt blb ble bli blk bll blm blr bls blt bmb bme bmi bmk bml bmm bmr bms bmt brb bre bri brk brl brm brr brs brt bsb bse bsi bsk bsl bsm bsr bss bst btb bte bti btk btl btm btr bts btt ebb ebe ebi ebk ebl ebm ebr ebs ebt eeb eee eek eel eem eer ees eet eib eie eii eik eil eim eir eis eit ekb eke eki ekl ekr eks ekt elb ele eli elk ell elm elr els elt em- emb eme emi emk eml emm emr ems emt erb ere eri erk erl erm err ers ert es- esb ese esi esk esl esm esr ess est etb ete eti etk etl etm etr ets ett ibb ibe ibi ibk ibl ibm ibr ibs ibt ie- iee iei iek iel iem ier ies iet iib iie iii iil iim iir iis iit ikb ike iki ikk ikl ikr iks ikt il- ilb ile ili ilk ill ilm ilr ils ilt im- imb ime imi iml imm ims imt ir- irb ire iri irk irl irm irr irs irt is- isb ise isi isk isl ism isr iss ist itb ite iti itk itl itm its itt k-t kbb kbe kbi kbk kbl kbm kbr kbs ke- keb kee kei kek kel kem ker kes ket kib kie kii kik kil kim kir kis kit kkb kke kki kkk kkl kkm kkr kks kkt kl- klb kli klm klr kls klt kmb kme kmi kmk kml kmm kms kmt kri krk krl krr krs krt ksb kse ksi ksk ksl ksm ksr kss kst ktb kte ktk ktl ktm ktr kts ktt lbb lbe lbi lbk lbl lbm lbr lbs lbt leb lee lei lek lel lem ler les let lib lie lii lik lil lim lir lis lit lkb lkl lkr lks lkt llb lle lli llk lll llm llr lls llt lmb lme lmi lmk lml lmm lmr lms lmt lrb lri lrk lrm lrr lrs lrt lsb lse lsi lsk lsl lsm lsr lss lst ltb lte lti ltk ltl ltm ltr lts ltt m-r mbb mbe mbi mbk mbl mbm mbr mbs mbt meb mee mei mek mel mem mer mes met mi- mib mie mii mik mil mim mir mis mit mkb mke mkk mkl mkm mkr mks mkt mlb mle mli mlk mll mlm mlr mls mlt mmb mme mmi mmk mml mmm mmr mms mmt mrb mre mri mrk mrl mrm mrr mrs mrt msb mse msi msk msl msm msr mss mst mtb mte mti mtk mtl mtm mtr mts mtt rbb rbe rbi rbk rbl rbm rbr rbs rbt re- reb ree rei rek rel rem rer res ret rib rie rii rik ril rim rir ris rit rkb rke rkk rkm rks rkt rle rli rll rlm rlr rls rlt rmb rme rmi rml rmm rmr rms rmt rrb rri rrk rrl rrm rrr rrs rrt rsb rse rsi rsk rsl rsm rsr rss rst rtb rte rti rtk rtl rtm rtr rts rtt sbb sbe sbi sbk sbl sbm sbr sbs sbt se- seb see sei sek sel sem ser ses set sib sie sii sik sil sim sir sis sit sk- skb ske ski skk skl skm skr sks skt slb sle sli slk sll slm slr sls slt smb sme smi smk sml smm smr sms smt sr- srb sre sri srk srl srm srr srs srt ss- ssb sse ssi ssk ssl ssm ssr sss sst stb ste sti stk stl stm str sts stt tbb tbe tbi tbk tbl tbm tbr tbs tbt te- teb tee tei tek tel tem ter tes tet tib tie tii tik til tim tir tis tit tkb tke tkk tkl tkm tkr tks tkt tle tli tlk tll tlm tlr tls tlt tmb tme tmi tmk tml tmm tmr tms tmt trb tre tri trk trl trm trr trs trt tsb tse tsi tsk tsl tsm tsr tss tst ttb tte tti ttk ttl ttm ttr tts ttt