-ic a-a a-c a-i a-t aaa aac aag aai aan aao aar aat aax ac- aca acc acg aci acn aco acr act acx ag- aga agc agg agi agn ago agr agt agx ai- aia aic aig aii ain aio air ait aix an- ana anc ang ani ann ano anr ant anx aoa aoc aog aoi aon aoo aor aot aox ar- ara arc arg ari arn aro arr art arx at- ata atc atg ati atn ato atr att atx ax- axa axi axn axo axr axt axx c-- caa cac cag cai can cao car cat cax cca ccc ccg cci ccn cco ccr cct ccx cga cgc cgg cgi cgn cgo cgr cgt ci- cia cic cig cii cin cio cir cit cix cn- cna cnc cng cni cnn cno cnr cnt cnx co- coa coc cog coi con coo cor cot cox cra crc crg cri crn cro crr crt crx cta ctc ctg cti ctn cto ctr ctt ctx cxc cxi cxo cxr cxt cxx gaa gac gag gai gan gao gar gat gca gcc gcg gci gcn gco gcr gct gga ggc ggg ggi ggn ggo ggr ggt gia gic gig gii gin gio gir git gna gnc gni gnn gno gnr gnt goa goc gog goi gon goo gor got gox gra grc grg gri grn gro grr grt grx gta gtc gtg gti gtn gto gtr gtt gtx gxa gxt ia- iaa iac iag iai ian iao iar iat ica icc icg ici icn ico icr ict iga igc igg igi ign igo igr igt iia iic iii iin iio iir iit iix in- ina inc ing ini inn ino inr int inx io- ioa ioc iog ioi ion ioo ior iot ir- ira irc irg iri irn iro irr irt irx ita itc itg iti itn ito itt itx ixc ixi ixn n-i naa nac nag nai nan nao nar nat nax nca ncc ncg nci ncn nco ncr nct ncx nga ngc ngg ngi ngn ngo ngt nia nic nig nii nin nio nir nit nix nna nnc nng nni nnn nno nnt no- noa noc nog noi non noo nor not nox nra nrc nrg nri nrn nro nrr nrt nrx nta ntc ntg nti ntn nto ntr ntt ntx nxc nxt o-i oaa oac oag oai oan oao oar oat oax oc- oca occ ocg oci ocn oco ocr oct ocx oga ogc ogg ogi ogn ogo ogt ogx oia oic oii oin oio oir oit on- ona onc ong oni onn ono onr ont onx oo- ooa ooc oog ooi oon ooo oor oot oox or- ora orc org ori orn oro orr ort orx ot- ota otc otg oti otn oto otr ott ox- oxa oxc oxi oxn oxo oxt oxx ra- raa rac rag rai ran rao rar rat rax rca rcc rcg rci rcn rco rcr rct rcx rga rgc rgg rgi rgn rgo rgr rgt rgx ria ric rig rii rin rio rir rit rix rna rnc rng rni rnn rno rnr rnt roa roc rog roi ron roo ror rot rox rra rrc rrg rri rrn rrr rrt rta rtc rtg rti rtn rto rtr rtt rtx rxr t-x taa tac tag tai tan tao tar tat tax tca tcc tcg tci tcn tco tcr tct tcx tga tgc tgg tgi tgn tgo tgr tgt tia tic tig tii tin tio tir tit tix tna tnc tng tni tnn tno tnr tnt tnx to- toa toc tog toi ton too tor tot tox tra trc trg tri trn tro trr trt trx tta ttc ttg tti ttn tto ttr ttt ttx txi txn txt xaa xac xag xan xar xat xci xcr xcx xgi xia xic 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