-er -ic -th a-a a-c a-i a-t aaa aac aae aag aah aai aar aas aat ac- aca acc ace acg ach aci acr acs act aea aec aee aeg aeh aei aer aes aet ag- aga agc age agg agh agi agr ags agt aha ahc ahe ahg ahh ahi ahr ahs aht ai- aia aic aie aig aih aii air ais ait ar- ara arc are arg arh ari arr ars art as- asa asc ase asg ash asi asr ass ast at- ata atc ate atg ath ati atr ats att c-- caa cac cae cag cah cai car cas cat cca ccc cce ccg cch cci ccr ccs cct ce- cea cec cee ceg ceh cei cer ces cet cga cgc cge cgg cgh cgi cgr cgs cgt ch- cha chc che chg chh chi chr chs cht ci- cia cic cie cig cih cii cir cis cit cra crc cre crg crh cri crr crs crt csa csc cse csg csh csi csr css cst cta ctc cte ctg cth cti ctr cts ctt eaa eac eae eag eah eai ear eas eat ec- eca ecc ece ecg ech eci ecr ecs ect eea eec eee eeg eer ees eet ega egc ege egg egh egi egr egs egt eha ehc ehe ehg ehh ehi ehr ehs eht eia eic eie eig eii eir eis eit era erc ere erg erh eri err ers ert es- esa esc ese esg esh esi esr ess est eta etc ete etg eth eti etr ets ett gaa gac gae gag gah gai gar gas gat gca gcc gce gcg gch gci gcr gcs gct ge- gea gec gee geg geh gei ger ges get gga ggc ggg ggh ggi ggr ggs ggt gha ghc ghe ghg ghh ghi ghr ghs ght gia gic gie gig gih gii gir gis git gra grc gre grg grh gri grr grs grt gsa gsc gse gsg gsi gsr gss gst gta gtc gte gtg gth gti gtr gts gtt h-i haa hac hae hag hah hai har has hat hca hcc hce hcg hch hci hcr hcs hct he- hea hec hee heg heh hei her hes het hga hgc hge hgg hgh hgi hgr hgs hgt hha hhc hhe hhg hhh hhi hhr hhs hht hia hic hie hig hih hii hir his hit hr- hra hrc hre hrg hrh hri hrr hrs hrt hsa hsc hse hsg hsh hsi hsr hss hst hta htc hte htg hth hti htr hts htt ia- iaa iac iae iag iah iai iar ias iat ica icc ice icg ich ici icr ics ict ie- iea iec iee ieg iei ier ies iet iga igc ige igg igh igi igr igs igt iha ihc ihe ihg ihh ihi ihr ihs iht iia iic iie iih iii iir iis iit ir- ira irc ire irg iri irr irs irt is- isa isc ise isg ish isi isr iss ist ita itc ite itg ith iti its itt ra- raa rac rae rag rah rai rar ras rat rca rcc rce rcg rch rci rcr rcs rct re- rea rec ree reg reh rei rer res ret rga rgc rge rgg rgh rgi rgr rgs rgt rh- rha rhc rhe rhg rhh rhi rhr rhs rht ria ric rie rig rih rii rir ris rit rra rrc rrg rrh rri rrr rrs rrt rsa rsc rse rsg rsh rsi rsr rss rst rta rtc rte rtg rti rtr rts rtt saa sac sae sag sah sai sar sas sat sca scc sce scg sch sci scr scs sct se- sea sec see seg seh sei ser ses set sga sgc sge sgg sgh sgi sgr sgs sgt sh- sha shc she shg shh shi shr shs sht sia sic sie sig sih sii sir sis sit sr- sra src sre srg srh sri srr srs srt ss- ssa ssc sse ssg ssh ssi ssr sss sst sta stc ste stg sth sti str sts stt taa tac tae tag tah tai tar tas tat tca tcc tce tcg tch tci tcr tcs tct te- tea tec tee teg teh tei ter tes tet tga tgc tge tgg tgh tgi tgr tgs tgt th- tha thc the thg thh thi thr ths tht tia tic tie tig tih tii tir tis tit tra trc tre trg trh tri trr trs trt tsa tsc tse tsg tsh tsi tsr tss tst tta ttc tte ttg tth tti ttr tts ttt