-er -ic a-a a-c a-i a-t aaa aac aae aaf aag aai aan aar aat aax ac- aca acc ace acf acg aci acn acr act acx aea aec aee aef aeg aei aen aer aet aex af- afa afc afe aff afg afi afn afr aft afx ag- aga agc age agf agg agi agn agr agt agx ai- aia aic aie aif aig aii ain air ait aix an- ana anc ane anf ang ani ann anr ant anx ar- ara arc are arf arg ari arn arr art arx at- ata atc ate atf atg ati atn atr att atx ax- axa axe axi axn axr axt axx c-- caa cac cae caf cag cai can car cat cax cca ccc cce ccf ccg cci ccn ccr cct ccx ce- cea cec cee cef ceg cei cen cer cet cex cfa cfc cfe cff cfg cfi cfn cfr cft cfx cga cgc cge cgg cgi cgn cgr cgt ci- cia cic cie cif cig cii cin cir cit cix cn- cna cnc cne cnf cng cni cnn cnr cnt cnx cra crc cre crf crg cri crn crr crt crx cta ctc cte ctf ctg cti ctn ctr ctt ctx cxc cxf cxi cxr cxt cxx eaa eac eae eaf eag eai ean ear eat eax ec- eca ecc ece ecf ecg eci ecn ecr ect ecx eea eec eee eef eeg een eer eet eex ef- efa efc efe eff efg efi efr eft efx ega egc ege egf egg egi egn egr egt egx eia eic eie eif eig eii ein eir eit eix en- ena enc ene enf eng eni enn enr ent era erc ere erf erg eri ern err ert eta etc ete etf etg eti etn etr ett etx ex- exa exc exe exi exr ext exx faa fac fae faf fag fai fan far fat fax fca fcc fce fcf fcg fci fcn fcr fct fcx fea fec fee fef feg fei fen fer fet fex ffa ffc ffe fff ffg ffi ffn ffr fft ffx fga fgc fge fgf fgg fgi fgn fgr fgt fia fic fie fif fig fii fin fir fit fix fna fnc fne fnf fng fni fnn fnr fnt fnx fra frc fre frf frg fri frn frr frt fta ftc fte ftf ftg fti ftn ftr ftt ftx fxe fxg fxi fxr fxt fxx gaa gac gae gaf gag gai gan gar gat gca gcc gce gcf gcg gci gcn gcr gct ge- gea gec gee gef geg gei gen ger get gex gfa gfc gfe gff gfi gfr gft gfx gga ggc ggg ggi ggn ggr ggt gia gic gie gif gig gii gin gir git gna gnc gne gnf gni gnn gnr gnt gra grc gre grf grg gri grn grr grt grx gta gtc gte gtf gtg gti gtn gtr gtt gtx gxa gxf gxt i-f ia- iaa iac iae iaf iag iai ian iar iat ica icc ice icf icg ici icn icr ict ie- iea iec iee ief ieg iei ien ier iet iex ifa ifc ife iff ifg ifi ifn ifr ift ifx iga igc ige igf igg igi ign igr igt iia iic iie iif iii iin iir iit iix in- ina inc ine inf ing ini inn inr int inx ir- ira irc ire irf irg iri irn irr irt irx ita itc ite itf itg iti itn itt itx ixc ixe ixi ixn n-i naa nac nae naf nag nai nan nar nat nax nca ncc nce ncf ncg nci ncn ncr nct ncx ne- nea nec nee nef neg nei nen ner net nex nfa nfc nfe nff nfi nfn nfr nft nga ngc nge ngf ngg ngi ngn ngt nia nic nie nif nig nii nin nir nit nix nna nnc nne nnf nng nni nnn nnt nra nrc nre nrf nrg nri nrn nrr nrt nrx nta ntc nte ntf ntg nti ntn ntr ntt ntx nxc nxt ra- raa rac rae raf rag rai ran rar rat rax rca rcc rce rcf rcg rci rcn rcr rct rcx re- rea rec ree ref reg rei ren rer ret rex rfa rfc rfe rff rfg rfi rfn rfr rft rga rgc rge rgf rgg rgi rgn rgr rgt rgx ria ric rie rif rig rii rin rir rit rix rna rnc rng rni rnn rnr rnt rra rrc rrf rrg rri rrn rrr rrt rta rtc rte rtf rtg rti rtn rtr rtt rtx rxr t-x taa tac tae taf tag tai tan tar tat tax tca tcc tce tcf tcg tci tcn tcr tct tcx te- tea tec tee tef teg tei ten ter tet tex tfa tfc tfe tff tfg tfi tfn tfr tft tfx tga tgc tge tgf tgg tgi tgn tgr tgt tia tic tie tif tig tii tin tir tit tix tna tnc tne tnf tng tni tnn tnr tnt tnx tra trc tre trf trg tri trn trr trt trx tta ttc tte ttf ttg tti ttn ttr ttt ttx txe txf txi txn txt xaa xac xaf xag xan xar xat xcf xci xcr xcx xee xeg xen xer xet xex xfa xfe xfn xft xfx xge xgi xia xic xie xii xin xit xix xna xnc xrc xrf xrt xrx xtc xtf xti xtr xtx xxi xxx