-er -ic a-a a-c a-i a-t aaa aac aae aag aai aan aao aar aat ac- aca acc ace acg aci acn aco acr act aea aec aee aeg aei aen aeo aer aet ag- aga agc age agg agi agn ago agr agt ai- aia aic aie aig aii ain aio air ait an- ana anc ane ang ani ann ano anr ant aoa aoc aoe aog aoi aon aoo aor aot ar- ara arc are arg ari arn aro arr art at- ata atc ate atg ati atn ato atr att c-- caa cac cae cag cai can cao car cat cca ccc cce ccg cci ccn cco ccr cct ce- cea cec cee ceg cei cen ceo cer cet cga cgc cge cgg cgi cgn cgo cgr cgt ci- cia cic cie cig cii cin cio cir cit cn- cna cnc cne cng cni cnn cno cnr cnt co- coa coc coe cog coi con coo cor cot cra crc cre crg cri crn cro crr crt cta ctc cte ctg cti ctn cto ctr ctt eaa eac eae eag eai ean eao ear eat ec- eca ecc ece ecg eci ecn eco ecr ect eea eec eee eeg een eeo eer eet ega egc ege egg egi egn ego egr egt eia eic eie eig eii ein eio eir eit 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 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 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 gra grc gre grg gri grn gro grr grt gta gtc gte gtg gti gtn gto gtr gtt 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 iga igc ige igg igi ign igo igr igt iia iic iie iii iin iio iir iit in- ina inc ine ing ini inn ino inr int io- ioa ioc ioe iog ioi ion ioo ior iot ir- ira irc ire irg iri irn iro irr irt ita itc ite itg iti itn ito itt n-i naa nac nae nag nai nan nao nar nat nca ncc nce ncg nci ncn nco ncr nct ne- nea nec nee neg nei nen neo ner net nga ngc nge ngg ngi ngn ngo ngt nia nic nie nig nii nin nio nir nit nna nnc nne nng nni nnn nno nnt no- noa noc noe nog noi non noo nor not nra nrc nre nrg nri nrn nro nrr nrt nta ntc nte ntg nti ntn nto ntr ntt o-i oaa oac oae oag oai oan oao oar oat oc- oca occ ocg oci ocn oco ocr oct oea oec oee oeg oei oen oeo oer oet oga ogc oge ogg ogi ogn ogo ogt oia oic oie oii oin oio oir oit on- ona onc one ong oni onn ono onr ont oo- ooa ooc oog ooi oon ooo oor oot or- ora orc ore org ori orn oro orr ort ot- ota otc ote otg oti otn oto otr ott ra- raa rac rae rag rai ran rao rar rat rca rcc rce rcg rci rcn rco rcr rct re- rea rec ree reg rei ren reo rer ret rga rgc rge rgg rgi rgn rgo rgr rgt ria ric rie rig rii rin rio rir rit rna rnc rng rni rnn rno rnr rnt roa roc roe rog roi ron roo ror rot rra rrc rrg rri rrn rrr rrt rta rtc rte rtg rti rtn rto rtr rtt taa tac tae tag tai tan tao tar tat tca tcc tce tcg tci tcn tco tcr tct te- tea tec tee teg tei ten teo ter tet tga tgc tge tgg tgi tgn tgo tgr tgt tia tic tie tig tii tin tio tir tit tna tnc tne tng tni tnn tno tnr tnt to- toa toc toe tog toi ton too tor tot tra trc tre trg tri trn tro trr trt tta ttc tte ttg tti ttn tto ttr ttt