-al -er a-a a-b a-i a-t aaa aab aae aai aak aal aar aas aat ab- aba abb abe abi abk abl abr abs abt aea aeb aee aei aek ael aer aes aet ai- aia aib aie aii aik ail air ais ait aka akb ake aki akk akl akr aks al- ala alb ale ali alk all alr als alt ar- ara arb are ari ark arl arr ars art as- asa asb ase asi ask asl asr ass ast at- ata atb ate ati atl atr ats att baa bab bae bai bak bal bar bas bat bba bbb bbe bbi bbk bbl bbr bbs bbt be- bea beb bee bei bek bel ber bes bet bi- bia bib bie bii bik bil bir bis bit bka bkb bke bkk bkl bkr bks bkt bla blb ble bli blk bll blr bls blt bra brb bre bri brk brl brr brs brt bsa bsb bse bsi bsk bsl bsr bss bst bta btb bte bti btk btl btr bts btt eaa eab eae eai eak eal ear eas eat eba ebb ebe ebi ebk ebl ebr ebs ebt eea eeb eee eek eel eer ees eet eia eib eie eii eik eil eir eis eit eka ekb eke eki ekl ekr eks ekt ela elb ele eli elk ell elr els elt era erb ere eri erk erl err ers ert es- esa esb ese esi esk esl esr ess est eta etb ete eti etk etl etr ets ett ia- iaa iab iae iai ial iar ias iat iba ibb ibe ibi ibk ibl ibr ibs ibt ie- iea iee iei iek iel ier ies iet iia iib iie iii iil iir iis iit ika ikb ike iki ikk ikl ikr iks ikt il- ila ilb ile ili ilk ill ilr ils ilt ir- ira irb ire iri irk irl irr irs irt is- isa isb ise isi isk isl isr iss ist ita itb ite iti itk itl its itt k-t ka- kaa kab kae kai kak kal kar kas kat kba kbb kbe kbi kbk kbl kbr kbs ke- kea keb kee kei kek kel ker kes ket kia kib kie kii kik kil kir kis kit kkb kke kki kkk kkl kkr kks kkt kl- kla klb kli klr kls klt kra kri krk krl krr krs krt ksa ksb kse ksi ksk ksl ksr kss kst kta ktb kte ktk ktl ktr kts ktt la- laa lab lae lai lak lal lar las lat lba lbb lbe lbi lbk lbl lbr lbs lbt lea leb lee lei lek lel ler les let lia lib lie lii lik lil lir lis lit lka lkb lkl lkr lks lkt lla llb lle lli llk lll llr lls llt lra lrb lri lrk lrr lrs lrt lsa lsb lse lsi lsk lsl lsr lss lst lta ltb lte lti ltk ltl ltr lts ltt ra- raa rab rae rai rak ral rar ras rat rba rbb rbe rbi rbk rbl rbr rbs rbt re- rea reb ree rei rek rel rer res ret ria rib rie rii rik ril rir ris rit rkb rke rkk rks rkt rla rle rli rll rlr rls rlt rra rrb rri rrk rrl rrr rrs rrt rsa rsb rse rsi rsk rsl rsr rss rst rta rtb rte rti rtk rtl rtr rts rtt saa sab sae sai sak sal sar sas sat sba sbb sbe sbi sbk sbl sbr sbs sbt se- sea seb see sei sek sel ser ses set sia sib sie sii sik sil sir sis sit sk- ska skb ske ski skk skl skr sks skt sla slb sle sli slk sll slr sls slt sr- sra srb sre sri srk srl srr srs srt ss- ssa ssb sse ssi ssk ssl ssr sss sst sta stb ste sti stk stl str sts stt taa tab tae tai tak tal tar tas tat tba tbb tbe tbi tbk tbl tbr tbs tbt te- tea teb tee tei tek tel ter tes tet tia tib tie tii tik til tir tis tit tka tkb tke tkk tkl tkr tks tkt tla tle tli tlk tll tlr tls tlt tra trb tre tri trk trl trr trs trt tsa tsb tse tsi tsk tsl tsr tss tst tta ttb tte tti ttk ttl ttr tts ttt