-er a-a aaa aae aao aap aar aas aea aee aeo aep aer aes aoa aoe aoo aop aor aos ap- apa ape apo app apr aps ar- ara are aro arp arr ars as- asa ase aso asp asr ass eaa eae eao eap ear eas eea eee eeo eep eer ees eo- eoa eoe eoo eop eor eos ep- epa epe epo epp epr eps era ere ero erp err ers es- esa ese eso esp esr ess oaa oae oao oap oar oas oea oee oeo oep oer oes oo- ooa ooo oop oor oos op- opa ope opo opp opr ops or- ora ore oro orp orr ors os- osa ose oso osp osr oss p-p paa pae pao pap par pas pea pee peo pep per pes poa poe poo pop por pos ppa ppe ppo ppp ppr pps pra pre pro prp prr prs ps- psa pse pso psp psr pss ra- raa rae rao rap rar ras re- rea ree reo rep rer res roa roe roo rop ror ros rpa rpe rpo rpp rpr rps rra rrp rrr rrs rsa rse rso rsp rsr rss saa sae sao sap sar sas se- sea see seo sep ser ses soa soe soo sop sor sos spa spe spo spp spr sps sr- sra sre sro srp srr srs ss- ssa sse sso ssp ssr sss