-al -er a-a a-b a-t aaa aab aae aaf aak aal aar aas aat ab- aba abb abe abf abk abl abr abs abt aea aeb aee aef aek ael aer aes aet af- afa afb afe aff afk afl afr afs aft aka akb ake akk akl akr aks al- ala alb ale alf alk all alr als alt ar- ara arb are arf ark arl arr ars art as- asa asb ase asf ask asl asr ass ast at- ata atb ate atf atl atr ats att baa bab bae baf bak bal bar bas bat bba bbb bbe bbf bbk bbl bbr bbs bbt be- bea beb bee bef bek bel ber bes bet bfa bfb bfe bff bfl bfr bfs bft bka bkb bke bkf bkk bkl bkr bks bkt bla blb ble blf blk bll blr bls blt bra brb bre brf brk brl brr brs brt bsa bsb bse bsf bsk bsl bsr bss bst bta btb bte btf btk btl btr bts btt eaa eab eae eaf eak eal ear eas eat eba ebb ebe ebf ebk ebl ebr ebs ebt eea eeb eee eef eek eel eer ees eet ef- efa efb efe eff efl efr efs eft eka ekb eke ekf ekl ekr eks ekt ela elb ele elf elk ell elr els elt era erb ere erf erk erl err ers ert es- esa esb ese esf esk esl esr ess est eta etb ete etf etk etl etr ets ett faa fab fae faf fak fal far fas fat fba fbb fbe fbf fbk fbl fbr fbs fbt fea feb fee fef fek fel fer fes fet ffa ffe fff ffk ffl ffr ffs fft fka fkb fkf fkk fkl fkt fla flb fle flf fll flr fls flt fra frb fre frf frk frl frr frs frt fsa fsb fse fsf fsk fsl fsr fss fst fta ftb fte ftf ftk ftl ftr fts ftt k-t ka- kaa kab kae kaf kak kal kar kas kat kba kbb kbe kbf kbk kbl kbr kbs ke- kea keb kee kef kek kel ker kes ket kfa kff kfs kkb kke kkk kkl kkr kks kkt kl- kla klb klf klr kls klt kra krf krk krl krr krs krt ksa ksb kse ksf ksk ksl ksr kss kst kta ktb kte ktf ktk ktl ktr kts ktt la- laa lab lae laf lak lal lar las lat lba lbb lbe lbf lbk lbl lbr lbs lbt lea leb lee lef lek lel ler les let lfa lfb lfe lff lfk lfl lfr lfs lft lka lkb lkl lkr lks lkt lla llb lle llf llk lll llr lls llt lra lrb lrf lrk lrr lrs lrt lsa lsb lse lsf lsk lsl lsr lss lst lta ltb lte ltf ltk ltl ltr lts ltt ra- raa rab rae raf rak ral rar ras rat rba rbb rbe rbf rbk rbl rbr rbs rbt re- rea reb ree ref rek rel rer res ret rfa rfb rfe rff rfk rfl rfr rfs rft rkb rke rkf rkk rks rkt rla rle rlf rll rlr rls rlt rra rrb rrf rrk rrl rrr rrs rrt rsa rsb rse rsf rsk rsl rsr rss rst rta rtb rte rtf rtk rtl rtr rts rtt saa sab sae saf sak sal sar sas sat sba sbb sbe sbf sbk sbl sbr sbs sbt se- sea seb see sef sek sel ser ses set sfa sfb sfe sff sfk sfl sfr sfs sft sk- ska skb ske skf skk skl skr sks skt sla slb sle slf slk sll slr sls slt sr- sra srb sre srf srk srl srr srs srt ss- ssa ssb sse ssf ssk ssl ssr sss sst sta stb ste stf stk stl str sts stt taa tab tae taf tak tal tar tas tat tba tbb tbe tbf tbk tbl tbr tbs tbt te- tea teb tee tef tek tel ter tes tet tfa tfb tfe tff tfk tfl tfr tfs tft tka tkb tke tkk tkl tkr tks tkt tla tle tlf tlk tll tlr tls tlt tra trb tre trf trk trl trr trs trt tsa tsb tse tsf tsk tsl tsr tss tst tta ttb tte ttf ttk ttl ttr tts ttt