-er -ic a-a a-c a-i a-t aaa aac aae aag aai aan aao aar aat aax ac- aca acc ace acg aci acn aco acr act acx aea aec aee aeg aei aen aeo aer aet aex ag- aga agc age agg agi agn ago agr agt agx ai- aia aic aie aig aii ain aio air ait aix an- ana anc ane ang ani ann ano anr ant anx aoa aoc aoe aog aoi aon aoo aor aot aox ar- ara arc are arg ari arn aro arr art arx at- ata atc ate atg ati atn ato atr att atx ax- axa axe axi axn axo axr axt axx c-- caa cac cae cag cai can cao car cat cax cca ccc cce ccg cci ccn cco ccr cct ccx ce- cea cec cee ceg cei cen ceo cer cet cex cga cgc cge cgg cgi cgn cgo cgr cgt ci- cia cic cie cig cii cin cio cir cit cix cn- cna cnc cne cng cni cnn cno cnr cnt cnx co- coa coc coe cog coi con coo cor cot cox cra crc cre crg cri crn cro crr crt crx cta ctc cte ctg cti ctn cto ctr ctt ctx cxc cxi cxo cxr cxt cxx eaa eac eae eag eai ean eao ear eat eax ec- eca ecc ece ecg eci ecn eco ecr ect ecx eea eec eee eeg een eeo eer eet eex ega egc ege egg egi egn ego egr egt egx eia eic eie eig eii ein eio eir eit eix en- ena enc ene eng eni enn eno enr ent eo- eoa eoc eoe eog eoi eon eoo eor eot era erc ere erg eri ern ero err ert eta etc ete etg eti etn eto etr ett etx ex- exa exc exe exi exo exr ext exx gaa gac gae gag gai gan gao gar gat gca gcc gce gcg gci gcn gco gcr gct ge- gea gec gee geg gei gen geo ger get gex gga ggc ggg ggi ggn ggo ggr ggt gia gic gie gig gii gin gio gir git gna gnc gne gni gnn gno gnr gnt goa goc goe gog goi gon goo gor got gox gra grc gre grg gri grn gro grr grt grx gta gtc gte gtg gti gtn gto gtr gtt gtx gxa gxt ia- iaa iac iae iag iai ian iao iar iat ica icc ice icg ici icn ico icr ict ie- iea iec iee ieg iei ien ier iet iex iga igc ige igg igi ign igo igr igt iia iic iie iii iin iio iir iit iix in- ina inc ine ing ini inn ino inr int inx io- ioa ioc ioe iog ioi ion ioo ior iot ir- ira irc ire irg iri irn iro irr irt irx ita itc ite itg iti itn ito itt itx ixc ixe ixi ixn n-i naa nac nae nag nai nan nao nar nat nax nca ncc nce ncg nci ncn nco ncr nct ncx ne- nea nec nee neg nei nen neo ner net nex nga ngc nge ngg ngi ngn ngo ngt nia nic nie nig nii nin nio nir nit nix nna nnc nne nng nni nnn nno nnt no- noa noc noe nog noi non noo nor not nox nra nrc nre nrg nri nrn nro nrr nrt nrx nta ntc nte ntg nti ntn nto ntr ntt ntx nxc nxt o-i oaa oac oae oag oai oan oao oar oat oax oc- oca occ ocg oci ocn oco ocr oct ocx oea oec oee oeg oei oen oeo oer oet oex oga ogc oge ogg ogi ogn ogo ogt ogx oia oic oie oii oin oio oir oit on- ona onc one ong oni onn ono onr ont onx oo- ooa ooc oog ooi oon ooo oor oot oox or- ora orc ore org ori orn oro orr ort orx ot- ota otc ote otg oti otn oto otr ott ox- oxa oxc oxi oxn oxo oxt oxx ra- raa rac rae rag rai ran rao rar rat rax rca rcc rce rcg rci rcn rco rcr rct rcx re- rea rec ree reg rei ren reo rer ret rex rga rgc rge rgg rgi rgn rgo rgr rgt rgx ria ric rie rig rii rin rio rir rit rix rna rnc rng rni rnn rno rnr rnt roa roc roe rog roi ron roo ror rot rox rra rrc rrg rri rrn rrr rrt rta rtc rte rtg rti rtn rto rtr rtt rtx rxr t-x taa tac tae tag tai tan tao tar tat tax tca tcc tce tcg tci tcn tco tcr tct tcx te- tea tec tee teg tei ten teo ter tet tex tga tgc tge tgg tgi tgn tgo tgr tgt tia tic tie tig tii tin tio tir tit tix tna tnc tne tng tni tnn tno tnr tnt tnx to- toa toc toe tog toi ton too tor tot tox tra trc tre trg tri trn tro trr trt trx tta ttc tte ttg tti ttn tto ttr ttt ttx txe txi txn txt xaa xac xag xan xar xat xci xcr xcx xee xeg xen xer xet xex xge xgi xia xic xie xii xin xio xit xix xna xnc xno xoa xoc xog xoi xon xoo xor xot xox xrc xrt xrx xtc xti xtr xtx xxi xxo xxx