-er a-a a-c aaa aac aae aaf aag aah aak aan aar aax ac- aca acc ace acf acg ach ack acn acr acx aea aec aee aef aeg aeh aek aen aer aex af- afa afc afe aff afg afh afk afn afr afx ag- aga agc age agf agg agh agk agn agr agx aha ahc ahe ahf ahg ahh ahk ahn ahr ahx aka akc ake akg akh akk akn akr an- ana anc ane anf ang anh ank ann anr anx ar- ara arc are arf arg arh ark arn arr arx ax- axa axe axh axk axn axr axx c-- caa cac cae caf cag cah cak can car cax cca ccc cce ccf ccg cch cck ccn ccr ccx ce- cea cec cee cef ceg ceh cek cen cer cex cfa cfc cfe cff cfg cfh cfk cfn cfr cfx cga cgc cge cgg cgh cgn cgr ch- cha chc che chf chg chh chk chn chr chx cka ckc ckh ckx cn- cna cnc cne cnf cng cnh cnn cnr cnx cra crc cre crf crg crh crk crn crr crx cxc cxf cxh cxk cxr cxx eaa eac eae eaf eag eah eak ean ear eax ec- eca ecc ece ecf ecg ech eck ecn ecr ecx eea eec eee eef eeg eek een eer eex ef- efa efc efe eff efg efh efr efx ega egc ege egf egg egh egn egr egx eha ehc ehe ehf ehg ehh ehn ehr eka ekc eke ekf ekg ekh ekr en- ena enc ene enf eng enh enk enn enr era erc ere erf erg erh erk ern err ex- exa exc exe exh exr exx faa fac fae faf fag fah fak fan far fax fca fcc fce fcf fcg fck fcn fcr fcx fea fec fee fef feg feh fek fen fer fex ffa ffc ffe fff ffg ffh ffk ffn ffr ffx fga fgc fge fgf fgg fgh fgn fgr fha fhc fhe fhf fhg fhh fhn fhr fka fkc fkf fkg fkk fna fnc fne fnf fng fnh fnk fnn fnr fnx fra frc fre frf frg frh frk frn frr fxe fxg fxr fxx gaa gac gae gaf gag gah gak gan gar gca gcc gce gcf gcg gch gck gcn gcr ge- gea gec gee gef geg geh gek gen ger gex gfa gfc gfe gff gfh gfk gfr gfx gga ggc ggg ggh ggn ggr gha ghc ghe ghg ghh ghn ghr gka gkh gkn gna gnc gne gnf gnn gnr gra grc gre grf grg grh grk grn grr grx gxa gxf haa hac hae haf hag hah hak han har hax hca hcc hce hcf hcg hch hck hcn hcr he- hea hec hee hef heg heh hek hen her hex hfa hfc hfe hff hfg hfh hfk hfn hfr hga hgc hge hgf hgg hgh hgk hgn hgr hha hhc hhe hhf hhg hhh hhk hhn hhr hka hkf hkg hkh hkk hkn hkr hna hnc hne hnf hng hnh hnk hnn hr- hra hrc hre hrf hrg hrh hrk hrn hrr hxc ka- kaa kac kae kaf kag kah kak kan kar kax kca kcc kce kcg kch kck kcn kcr kcx ke- kea kec kee kef keg keh kek ken ker kex kfa kfc kff kfg kfh kfx kga kgc kgf kgh kgx kha khe khf khh khk khn khr kkc kke kkh kkk kkn kkr kn- kna knc kne knf kng knk knn knr knx kra krc krf krg krk krn krr naa nac nae naf nag nah nak nan nar nax nca ncc nce ncf ncg nch nck ncn ncr ncx ne- nea nec nee nef neg neh nek nen ner nex nfa nfc nfe nff nfk nfn nfr nga ngc nge ngf ngg ngh ngk ngn nha nhc nhe nhf nhg nhh nhk nhn nhr nka nkc nke nkf nkk nkn nkr nna nnc nne nnf nng nnh nnk nnn nra nrc nre nrf nrg nrk nrn nrr nrx nxc ra- raa rac rae raf rag rah rak ran rar rax rca rcc rce rcf rcg rch rcn rcr rcx re- rea rec ree ref reg reh rek ren rer rex rfa rfc rfe rff rfg rfh rfk rfn rfr rga rgc rge rgf rgg rgh rgk rgn rgr rgx rh- rha rhc rhe rhf rhg rhh rhn rhr rkc rke rkf rkg rkk rna rnc rng rnh rnn rnr rra rrc rrf rrg rrh rrk rrn rrr rxr xaa xac xaf xag xak xan xar xcf xch xcr xcx xee xeg xen xer xex xfa xfe xfh xfn xfx xge xke xna xnc xnk xrc xrf xrx xxx