-er -ic a-a a-c a-i a-t aaa aac aae aaf aag aai aao aar aas aat ac- aca acc ace acf acg aci aco acr acs act aea aec aee aef aeg aei aeo aer aes aet af- afa afc afe aff afg afi afo afr afs aft ag- aga agc age agf agg agi ago agr ags agt ai- aia aic aie aif aig aii aio air ais ait aoa aoc aoe aof aog aoi aoo aor aos aot ar- ara arc are arf arg ari aro arr ars art as- asa asc ase asf asg asi aso asr ass ast at- ata atc ate atf atg ati ato atr ats att c-- caa cac cae caf cag cai cao car cas cat cca ccc cce ccf ccg cci cco ccr ccs cct ce- cea cec cee cef ceg cei ceo cer ces cet cfa cfc cfe cff cfg cfi cfo cfr cfs cft cga cgc cge cgg cgi cgo cgr cgs cgt ci- cia cic cie cif cig cii cio cir cis cit co- coa coc coe cof cog coi coo cor cos cot cra crc cre crf crg cri cro crr crs crt csa csc cse csf csg csi cso csr css cst cta ctc cte ctf ctg cti cto ctr cts ctt eaa eac eae eaf eag eai eao ear eas eat ec- eca ecc ece ecf ecg eci eco ecr ecs ect eea eec eee eef eeg eeo eer ees eet ef- efa efc efe eff efg efi efo efr efs eft ega egc ege egf egg egi ego egr egs egt eia eic eie eif eig eii eio eir eis eit eo- eoa eoc eoe eof eog eoi eoo eor eos eot era erc ere erf erg eri ero err ers ert es- esa esc ese esf esg esi eso esr ess est eta etc ete etf etg eti eto etr ets ett faa fac fae faf fag fai fao far fas fat fca fcc fce fcf fcg fci fco fcr fcs fct fea fec fee fef feg fei feo fer fes fet ffa ffc ffe fff ffg ffi ffo ffr ffs fft fga fgc fge fgf fgg fgi fgr fgs fgt fia fic fie fif fig fii fir fis fit foa foc foe fof fog foi foo for fos fot fra frc fre frf frg fri fro frr frs frt fsa fsc fse fsf fsg fsi fso fsr fss fst fta ftc fte ftf ftg fti fto ftr fts ftt gaa gac gae gaf gag gai gao gar gas gat gca gcc gce gcf gcg gci gco gcr gcs gct ge- gea gec gee gef geg gei geo ger ges get gfa gfc gfe gff gfi gfo gfr gfs gft gga ggc ggg ggi ggo ggr ggs ggt gia gic gie gif gig gii gio gir gis git goa goc goe gof gog goi goo gor gos got gra grc gre grf grg gri gro grr grs grt gsa gsc gse gsf gsg gsi gso gsr gss gst gta gtc gte gtf gtg gti gto gtr gts gtt i-f ia- iaa iac iae iaf iag iai iao iar ias iat ica icc ice icf icg ici ico icr ics ict ie- iea iec iee ief ieg iei ier ies iet ifa ifc ife iff ifg ifi ifo ifr ifs ift iga igc ige igf igg igi igo igr igs igt iia iic iie iif iii iio iir iis iit io- ioa ioc ioe iof iog ioi ioo ior ios iot ir- ira irc ire irf irg iri iro irr irs irt is- isa isc ise isf isg isi iso isr iss ist ita itc ite itf itg iti ito its itt o-i oaa oac oae oaf oag oai oao oar oas oat oc- oca occ ocf ocg oci oco ocr ocs oct oea oec oee oef oeg oei oeo oer oes oet of- ofa ofc ofe off ofg ofi ofo ofr ofs oft oga ogc oge ogf ogg ogi ogo ogs ogt oia oic oie oif oii oio oir ois oit oo- ooa ooc oof oog ooi ooo oor oos oot or- ora orc ore orf org ori oro orr ors ort os- osa osc ose osf osg osi oso osr oss ost ot- ota otc ote otf otg oti oto otr ots ott ra- raa rac rae raf rag rai rao rar ras rat rca rcc rce rcf rcg rci rco rcr rcs rct re- rea rec ree ref reg rei reo rer res ret rfa rfc rfe rff rfg rfi rfo rfr rfs rft rga rgc rge rgf rgg rgi rgo rgr rgs rgt ria ric rie rif rig rii rio rir ris rit roa roc roe rof rog roi roo ror ros rot rra rrc rrf rrg rri rrr rrs rrt rsa rsc rse rsf rsg rsi rso rsr rss rst rta rtc rte rtf rtg rti rto rtr rts rtt saa sac sae saf sag sai sao sar sas sat sca scc sce scf scg sci sco scr scs sct se- sea sec see sef seg sei seo ser ses set sfa sfc sfe sff sfg sfi sfo sfr sfs sft sga sgc sge sgf sgg sgi sgo sgr sgs sgt sia sic sie sif sig sii sio sir sis sit soa soc soe sof sog soi soo sor sos sot sr- sra src sre srf srg sri sro srr srs srt ss- ssa ssc sse ssf ssg ssi sso ssr sss sst sta stc ste stf stg sti sto str sts stt taa tac tae taf tag tai tao tar tas tat tca tcc tce tcf tcg tci tco tcr tcs tct te- tea tec tee tef teg tei teo ter tes tet tfa tfc tfe tff tfg tfi tfo tfr tfs tft tga tgc tge tgf tgg tgi tgo tgr tgs tgt tia tic tie tif tig tii tio tir tis tit to- toa toc toe tof tog toi too tor tos tot tra trc tre trf