-er -th a-a a-c a-t aaa aac aae aag aah aao aap aar aat ac- aca acc ace acg ach aco acp acr act aea aec aee aeg aeh aeo aep aer aet ag- aga agc age agg agh ago agp agr agt aha ahc ahe ahg ahh aho ahp ahr aht aoa aoc aoe aog aoh aoo aop aor aot ap- apa apc ape apg aph apo app apr apt ar- ara arc are arg arh aro arp arr art at- ata atc ate atg ath ato atp atr att c-- caa cac cae cag cah cao cap car cat cca ccc cce ccg cch cco ccp ccr cct ce- cea cec cee ceg ceh ceo cep cer cet cga cgc cge cgg cgh cgo cgp cgr cgt ch- cha chc che chg chh cho chp chr cht co- coa coc coe cog coh coo cop cor cot cpa cpc cpe cpg cph cpo cpp cpr cpt cra crc cre crg crh cro crp crr crt cta ctc cte ctg cth cto ctp ctr ctt eaa eac eae eag eah eao eap ear eat ec- eca ecc ece ecg ech eco ecr ect eea eec eee eeg eeo eep eer eet ega egc ege egg egh ego egp egr egt eha ehc ehe ehg ehh eho ehp ehr eht eo- eoa eoc eoe eog eoh eoo eop eor eot ep- epa epc epe epg eph epo epp epr ept era erc ere erg erh ero erp err ert eta etc ete etg eth eto etp etr ett g-p gaa gac gae gag gah gao gap gar gat gca gcc gce gcg gch gco gcp gcr gct ge- gea gec gee geg geh geo gep ger get gga ggc ggg ggh ggo ggp ggr ggt gha ghc ghe ghg ghh gho ghp ghr ght goa goc goe gog goh goo gop gor got gpa gpc gpe gpg gph gpo gpp gpr gpt gra grc gre grg grh gro grp grr grt gta gtc gte gtg gth gto gtp gtr gtt haa hac hae hag hah hao hap har hat hca hcc hce hcg hch hco hcp hcr hct he- hea hec hee heg heh heo hep her het hga hgc hge hgg hgh hgo hgp hgr hgt hha hhc hhe hhg hhh hho hhp hhr hht hoa hoc hoe hog hoh hoo hop hor hot hpa hpc hpe hpg hph hpo hpp hpr hpt hr- hra hrc hre hrg hrh hro hrp hrr hrt hta htc hte htg hth hto htp htr htt oaa oac oae oag oah oao oap oar oat oc- oca occ ocg och oco ocp ocr oct oea oec oee oeg oeh oeo oep oer oet oga ogc oge ogg ogh ogo ogp ogt oha ohc ohe ohg ohh oho ohp ohr oht oo- ooa ooc oog ooh ooo oop oor oot op- opa opc ope opg oph opo opp opr opt or- ora orc ore org orh oro orp orr ort ot- ota otc ote otg oth oto otp otr ott p-p paa pac pae pag pah pao pap par pat pca pcc pce pcg pch pco pcp pcr pct pea pec pee peg peh peo pep per pet pga pgc pge pgg pgh pgo pgp pgr pgt pha phc phe phg pho php phr pht poa poc poe pog poh poo pop por pot ppa ppc ppe ppg pph ppo ppp ppr ppt pra prc pre prg prh pro prp prr prt pt- pta ptc pte ptg pth pto ptp ptr ptt ra- raa rac rae rag rah rao rap rar rat rca rcc rce rcg rch rco rcp rcr rct re- rea rec ree reg reh reo rep rer ret rga rgc rge rgg rgh rgo rgp rgr rgt rh- rha rhc rhe rhg rhh rho rhp rhr rht roa roc roe rog roh roo rop ror rot rpa rpc rpe rpg rph rpo rpp rpr rpt rra rrc rrg rrh rrp rrr rrt rta rtc rte rtg rto rtp rtr rtt taa tac tae tag tah tao tap tar tat tca tcc tce tcg tch tco tcp tcr tct te- tea tec tee teg teh teo tep ter tet tga tgc tge tgg tgh tgo tgp tgr tgt th- tha thc the thg thh tho thp thr tht to- toa toc toe tog toh too top tor tot tpa tpc tpe tpg tph tpo tpp tpr tpt tra trc tre trg trh tro trp trr trt tta ttc tte ttg tth tto ttp ttr ttt