-er -ic a-a a-c a-i a-t aaa aac aae aaf aag aai aan aar aat ac- aca acc ace acf acg aci acn acr act aea aec aee aef aeg aei aen aer aet af- afa afc afe aff afg afi afn afr aft ag- aga agc age agf agg agi agn agr agt ai- aia aic aie aif aig aii ain air ait an- ana anc ane anf ang ani ann anr ant ar- ara arc are arf arg ari arn arr art at- ata atc ate atf atg ati atn atr att c-- caa cac cae caf cag cai can car cat cca ccc cce ccf ccg cci ccn ccr cct ce- cea cec cee cef ceg cei cen cer cet cfa cfc cfe cff cfg cfi cfn cfr cft cga cgc cge cgg cgi cgn cgr cgt ci- cia cic cie cif cig cii cin cir cit cn- cna cnc cne cnf cng cni cnn cnr cnt cra crc cre crf crg cri crn crr crt cta ctc cte ctf ctg cti ctn ctr ctt eaa eac eae eaf eag eai ean ear eat ec- eca ecc ece ecf ecg eci ecn ecr ect eea eec eee eef eeg een eer eet ef- efa efc efe eff efg efi efr eft ega egc ege egf egg egi egn egr egt eia eic eie eif eig eii ein eir eit 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 faa fac fae faf fag fai fan far fat fca fcc fce fcf fcg fci fcn fcr fct fea fec fee fef feg fei fen fer fet ffa ffc ffe fff ffg ffi ffn ffr fft fga fgc fge fgf fgg fgi fgn fgr fgt fia fic fie fif fig fii fin fir fit fna fnc fne fnf fng fni fnn fnr fnt fra frc fre frf frg fri frn frr frt fta ftc fte ftf ftg fti ftn ftr ftt 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 gfa gfc gfe gff gfi gfr gft 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 gta gtc gte gtf gtg gti gtn gtr gtt 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 ifa ifc ife iff ifg ifi ifn ifr ift iga igc ige igf igg igi ign igr igt iia iic iie iif iii iin iir iit in- ina inc ine inf ing ini inn inr int ir- ira irc ire irf irg iri irn irr irt ita itc ite itf itg iti itn itt n-i naa nac nae naf nag nai nan nar nat nca ncc nce ncf ncg nci ncn ncr nct ne- nea nec nee nef neg nei nen ner net 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 nna nnc nne nnf nng nni nnn nnt nra nrc nre nrf nrg nri nrn nrr nrt nta ntc nte ntf ntg nti ntn ntr ntt ra- raa rac rae raf rag rai ran rar rat rca rcc rce rcf rcg rci rcn rcr rct re- rea rec ree ref reg rei ren rer ret rfa rfc rfe rff rfg rfi rfn rfr rft rga rgc rge rgf rgg rgi rgn rgr rgt ria ric rie rif rig rii rin rir rit rna rnc rng rni rnn rnr rnt rra rrc rrf rrg rri rrn rrr rrt rta rtc rte rtf rtg rti rtn rtr rtt taa tac tae taf tag tai tan tar tat tca tcc tce tcf tcg tci tcn tcr tct te- tea tec tee tef teg tei ten ter tet tfa tfc tfe tff tfg tfi tfn tfr tft tga tgc tge tgf tgg tgi tgn tgr tgt tia tic tie tif tig tii tin tir tit tna tnc tne tnf tng tni tnn tnr tnt tra trc tre trf trg tri trn trr trt tta ttc tte ttf ttg tti ttn ttr ttt