-er a-a a-c aaa aac aae aag aah aao aap aar ac- aca acc ace acg ach aco acp acr aea aec aee aeg aeh aeo aep aer ag- aga agc age agg agh ago agp agr aha ahc ahe ahg ahh aho ahp ahr aoa aoc aoe aog aoh aoo aop aor ap- apa apc ape apg aph apo app apr ar- ara arc are arg arh aro arp arr c-- caa cac cae cag cah cao cap car cca ccc cce ccg cch cco ccp ccr ce- cea cec cee ceg ceh ceo cep cer cga cgc cge cgg cgh cgo cgp cgr ch- cha chc che chg chh cho chp chr co- coa coc coe cog coh coo cop cor cpa cpc cpe cpg cph cpo cpp cpr cra crc cre crg crh cro crp crr eaa eac eae eag eah eao eap ear ec- eca ecc ece ecg ech eco ecr eea eec eee eeg eeo eep eer ega egc ege egg egh ego egp egr eha ehc ehe ehg ehh eho ehp ehr eo- eoa eoc eoe eog eoh eoo eop eor ep- epa epc epe epg eph epo epp epr era erc ere erg erh ero erp err g-p gaa gac gae gag gah gao gap gar gca gcc gce gcg gch gco gcp gcr ge- gea gec gee geg geh geo gep ger gga ggc ggg ggh ggo ggp ggr gha ghc ghe ghg ghh gho ghp ghr goa goc goe gog goh goo gop gor gpa gpc gpe gpg gph gpo gpp gpr gra grc gre grg grh gro grp grr haa hac hae hag hah hao hap har hca hcc hce hcg hch hco hcp hcr he- hea hec hee heg heh heo hep her hga hgc hge hgg hgh hgo hgp hgr hha hhc hhe hhg hhh hho hhp hhr hoa hoc hoe hog hoh hoo hop hor hpa hpc hpe hpg hph hpo hpp hpr hr- hra hrc hre hrg hrh hro hrp hrr oaa oac oae oag oah oao oap oar oc- oca occ ocg och oco ocp ocr oea oec oee oeg oeh oeo oep oer oga ogc oge ogg ogh ogo ogp oha ohc ohe ohg ohh oho ohp ohr oo- ooa ooc oog ooh ooo oop oor op- opa opc ope opg oph opo opp opr or- ora orc ore org orh oro orp orr p-p paa pac pae pag pah pao pap par pca pcc pce pcg pch pco pcp pcr pea pec pee peg peh peo pep per pga pgc pge pgg pgh pgo pgp pgr pha phc phe phg pho php phr poa poc poe pog poh poo pop por ppa ppc ppe ppg pph ppo ppp ppr pra prc pre prg prh pro prp prr ra- raa rac rae rag rah rao rap rar rca rcc rce rcg rch rco rcp rcr re- rea rec ree reg reh reo rep rer rga rgc rge rgg rgh rgo rgp rgr rh- rha rhc rhe rhg rhh rho rhp rhr roa roc roe rog roh roo rop ror rpa rpc rpe rpg rph rpo rpp rpr rra rrc rrg rrh rrp rrr