-er a-a a-b a-t aaa aab aae aaf aak aar aas aat ab- aba abb abe abf abk abr abs abt aea aeb aee aef aek aer aes aet af- afa afb afe aff afk afr afs aft aka akb ake akk akr aks ar- ara arb are arf ark arr ars art as- asa asb ase asf ask asr ass ast at- ata atb ate atf atr ats att baa bab bae baf bak bar bas bat bba bbb bbe bbf bbk bbr bbs bbt be- bea beb bee bef bek ber bes bet bfa bfb bfe bff bfr bfs bft bka bkb bke bkf bkk bkr bks bkt bra brb bre brf brk brr brs brt bsa bsb bse bsf bsk bsr bss bst bta btb bte btf btk btr bts btt eaa eab eae eaf eak ear eas eat eba ebb ebe ebf ebk ebr ebs ebt eea eeb eee eef eek eer ees eet ef- efa efb efe eff efr efs eft eka ekb eke ekf ekr eks ekt era erb ere erf erk err ers ert es- esa esb ese esf esk esr ess est eta etb ete etf etk etr ets ett faa fab fae faf fak far fas fat fba fbb fbe fbf fbk fbr fbs fbt fea feb fee fef fek fer fes fet ffa ffe fff ffk ffr ffs fft fka fkb fkf fkk fkt fra frb fre frf frk frr frs frt fsa fsb fse fsf fsk fsr fss fst fta ftb fte ftf ftk ftr fts ftt k-t ka- kaa kab kae kaf kak kar kas kat kba kbb kbe kbf kbk kbr kbs ke- kea keb kee kef kek ker kes ket kfa kff kfs kkb kke kkk kkr kks kkt kra krf krk krr krs krt ksa ksb kse ksf ksk ksr kss kst kta ktb kte ktf ktk ktr kts ktt ra- raa rab rae raf rak rar ras rat rba rbb rbe rbf rbk rbr rbs rbt re- rea reb ree ref rek rer res ret rfa rfb rfe rff rfk rfr rfs rft rkb rke rkf rkk rks rkt rra rrb rrf rrk rrr rrs rrt rsa rsb rse rsf rsk rsr rss rst rta rtb rte rtf rtk rtr rts rtt saa sab sae saf sak sar sas sat sba sbb sbe sbf sbk sbr sbs sbt se- sea seb see sef sek ser ses set sfa sfb sfe sff sfk sfr sfs sft sk- ska skb ske skf skk skr sks skt sr- sra srb sre srf srk srr srs srt ss- ssa ssb sse ssf ssk ssr sss sst sta stb ste stf stk str sts stt taa tab tae taf tak tar tas tat tba tbb tbe tbf tbk tbr tbs tbt te- tea teb tee tef tek ter tes tet tfa tfb tfe tff tfk tfr tfs tft tka tkb tke tkk tkr tks tkt tra trb tre trf trk trr trs trt tsa tsb tse tsf tsk tsr tss tst tta ttb tte ttf ttk ttr tts ttt

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