-er -ic a-a a-c a-i a-t aaa aac aad aae aag aai aak aar aas aat ac- aca acc acd ace acg aci ack acr acs act ad- ada adc add ade adg adi adk adr ads adt aea aec aed aee aeg aei aek aer aes aet ag- aga agc agd age agg agi agk agr ags agt ai- aia aic aid aie aig aii aik air ais ait aka akc akd ake akg aki akk akr aks ar- ara arc ard are arg ari ark arr ars art as- asa asc asd ase asg asi ask asr ass ast at- ata atc atd ate atg ati atr ats att c-- caa cac cad cae cag cai cak car cas cat cca ccc ccd cce ccg cci cck ccr ccs cct cda cdc cdd cde cdg cdi cdk cdr cds cdt ce- cea cec ced cee ceg cei cek cer ces cet cga cgc cgd cge cgg cgi cgr cgs cgt ci- cia cic cid cie cig cii cik cir cis cit cka ckc ckd cki cks ckt cra crc crd cre crg cri crk crr crs crt csa csc csd cse csg csi csk csr css cst cta ctc ctd cte ctg cti ctk ctr cts ctt daa dac dad dae dag dai dak dar das dat dca dcc dcd dce dcg dci dck dcr dcs dct dda ddc ddd dde ddg ddi ddk ddr dds ddt de- dea dec ded dee deg dei dek der des det dga dgc dgd dge dgg dgi dgk dgr dgs dgt di- dia dic did die dig dii dik dir dis dit dka dkc dke dkg dki dkk dkr dks dkt dra drc drd dre drg dri drk drr drs drt dsa dsc dsd dse dsg dsi dsk dsr dss dst dta dtc dtd dte dtg dti dtk dtr dts dtt eaa eac ead eae eag eai eak ear eas eat ec- eca ecc ecd ece ecg eci eck ecr ecs ect ed- eda edc edd ede edg edi edk edr eds edt eea eec eed eee eeg eek eer ees eet ega egc egd ege egg egi egr egs egt eia eic eid eie eig eii eik eir eis eit eka ekc ekd eke ekg eki ekr eks ekt era erc erd ere erg eri erk err ers ert es- esa esc esd ese esg esi esk esr ess est eta etc etd ete etg eti etk etr ets ett g-d gaa gac gad gae gag gai gak gar gas gat gca gcc gcd gce gcg gci gck gcr gcs gct gda gdc gdd gde gdi gdk gdr gds gdt ge- gea gec ged gee geg gei gek ger ges get gga ggc ggd ggg ggi ggr ggs ggt gia gic gid gie gig gii gik gir gis git gka gkd gks gkt gra grc grd gre grg gri grk grr grs grt gsa gsc gsd gse gsg gsi gsk gsr gss gst gta gtc gtd gte gtg gti gtk gtr gts gtt i-d ia- iaa iac iad iae iag iai iar ias iat ica icc icd ice icg ici ick icr ics ict ida idc idd ide idg idi idk idr ids idt ie- iea iec ied iee ieg iei iek ier ies iet iga igc igd ige igg igi igk igr igs igt iia iic iid iie iii iir iis iit ika ikc ike iki ikk ikr iks ikt ir- ira irc ird ire irg iri irk irr irs irt is- isa isc isd ise isg isi isk isr iss ist ita itc itd ite itg iti itk its itt k-t ka- kaa kac kad kae kag kai kak kar kas kat kca kcc kcd kce kcg kci kck kcr kcs kct kda kdc kde kdg kdk kdr kds kdt ke- kea kec ked kee keg kei kek ker kes ket kga kgc kgd kgi kgs kia kic kid kie kig kii kik kir kis kit kkc kke kki kkk kkr kks kkt kra krc krd krg kri krk krr krs krt ksa ksc ksd kse ksg ksi ksk ksr kss kst kta ktc kte ktg ktk ktr kts ktt ra- raa rac rad rae rag rai rak rar ras rat rca rcc rcd rce rcg rci rcr rcs rct rda rdc rdd rde rdg rdi rdr rds rdt re- rea rec red ree reg rei rek rer res ret rga rgc rgd rge rgg rgi rgk rgr rgs rgt ria ric rid rie rig rii rik rir ris rit rkc rke rkg rkk rks rkt rra rrc rrd rrg rri rrk rrr rrs rrt rsa rsc rsd rse rsg rsi rsk rsr rss rst rta rtc rtd rte rtg rti rtk rtr rts rtt saa sac sad sae sag sai sak sar sas sat sca scc scd sce scg sci sck scr scs sct sda sdc sdd sde sdg sdi sdk sdr sds sdt se- sea sec sed see seg sei sek ser ses set sga sgc sgd sge sgg sgi sgk sgr sgs sgt sia sic sid sie sig sii sik sir sis sit sk- ska skc skd ske skg ski skk skr sks skt sr- sra src srd sre srg sri srk srr srs srt ss- ssa ssc ssd sse ssg ssi ssk ssr sss sst sta stc std ste stg sti stk str sts stt taa tac tad tae tag tai tak tar tas tat tca tcc tcd tce tcg tci tck tcr tcs tct tda tdc tdd tde tdg tdi tdk tdr tds tdt te- tea tec ted tee teg tei tek ter tes tet tga tgc tge tgg tgi tgk tgr tgs tgt tia tic tid tie tig tii tik tir tis tit tka tkc tke tkg tkk tkr tks tkt tra trc trd tre trg tri trk trr trs trt tsa tsc tsd tse tsg tsi tsk tsr tss tst tta ttc ttd tte ttg tti ttk ttr tts ttt