-er -ic a-a a-c a-i a-t aaa aac aae aag aai aao aap aar aat ac- aca acc ace acg aci aco acp acr act aea aec aee aeg aei aeo aep aer aet ag- aga agc age agg agi ago agp agr agt ai- aia aic aie aig aii aio aip air ait aoa aoc aoe aog aoi aoo aop aor aot ap- apa apc ape apg api apo app apr apt ar- ara arc are arg ari aro arp arr art at- ata atc ate atg ati ato atp atr att c-- caa cac cae cag cai cao cap car cat cca ccc cce ccg cci cco ccp ccr cct ce- cea cec cee ceg cei ceo cep cer cet cga cgc cge cgg cgi cgo cgp cgr cgt ci- cia cic cie cig cii cio cip cir cit co- coa coc coe cog coi coo cop cor cot cpa cpc cpe cpg cpi cpo cpp cpr cpt cra crc cre crg cri cro crp crr crt cta ctc cte ctg cti cto ctp ctr ctt eaa eac eae eag eai eao eap ear eat ec- eca ecc ece ecg eci eco ecr ect eea eec eee eeg eeo eep eer eet ega egc ege egg egi ego egp egr egt eia eic eie eig eii eio eip eir eit eo- eoa eoc eoe eog eoi eoo eop eor eot ep- epa epc epe epg epi epo epp epr ept era erc ere erg eri ero erp err ert eta etc ete etg eti eto etp etr ett g-p gaa gac gae gag gai gao gap gar gat gca gcc gce gcg gci gco gcp gcr gct ge- gea gec gee geg gei geo gep ger get gga ggc ggg ggi ggo ggp ggr ggt gia gic gie gig gii gio gip gir git goa goc goe gog goi goo gop gor got gpa gpc gpe gpg gpi gpo gpp gpr gpt gra grc gre grg gri gro grp grr grt gta gtc gte gtg gti gto gtp gtr gtt ia- iaa iac iae iag iai iao iap iar iat ica icc ice icg ici ico icp icr ict ie- iea iec iee ieg iei iep ier iet iga igc ige igg igi igo igp igr igt iia iic iie iii iio iip iir iit io- ioa ioc ioe iog ioi ioo iop ior iot ipa ipc ipe ipg ipi ipo ipp ipr ipt ir- ira irc ire irg iri iro irp irr irt ita itc ite itg iti ito itp itt o-i oaa oac oae oag oai oao oap oar oat oc- oca occ ocg oci oco ocp ocr oct oea oec oee oeg oei oeo oep oer oet oga ogc oge ogg ogi ogo ogp ogt oia oic oie oii oio oip oir oit oo- ooa ooc oog ooi ooo oop oor oot op- opa opc ope opg opi opo opp opr opt or- ora orc ore org ori oro orp orr ort ot- ota otc ote otg oti oto otp otr ott p-p paa pac pae pag pai pao pap par pat pca pcc pce pcg pci pco pcp pcr pct pea pec pee peg pei peo pep per pet pga pgc pge pgg pgi pgo pgp pgr pgt pia pic pie pig pii pio pip pir pit poa poc poe pog poi poo pop por pot ppa ppc ppe ppg ppi ppo ppp ppr ppt pra prc pre prg pri pro prp prr prt pt- pta ptc pte ptg pti pto ptp ptr ptt ra- raa rac rae rag rai rao rap rar rat rca rcc rce rcg rci rco rcp rcr rct re- rea rec ree reg rei reo rep rer ret rga rgc rge rgg rgi rgo rgp rgr rgt ria ric rie rig rii rio rip rir rit roa roc roe rog roi roo rop ror rot rpa rpc rpe rpg rpi rpo rpp rpr rpt rra rrc rrg rri rrp rrr rrt rta rtc rte rtg rti rto rtp rtr rtt taa tac tae tag tai tao tap tar tat tca tcc tce tcg tci tco tcp tcr tct te- tea tec tee teg tei teo tep ter tet tga tgc tge tgg tgi tgo tgp tgr tgt tia tic tie tig tii tio tip tir tit to- toa toc toe tog toi too top tor tot tpa tpc tpe tpg tpi tpo tpp tpr tpt tra trc tre trg tri tro trp trr trt tta ttc tte ttg tti tto ttp ttr ttt