-er a-a aaa aae aao aap aar aea aee aeo aep aer aoa aoe aoo aop aor ap- apa ape apo app apr ar- ara are aro arp arr eaa eae eao eap ear eea eee eeo eep eer eo- eoa eoe eoo eop eor ep- epa epe epo epp epr era ere ero erp err oaa oae oao oap oar oea oee oeo oep oer oo- ooa ooo oop oor op- opa ope opo opp opr or- ora ore oro orp orr p-p paa pae pao pap par pea pee peo pep per poa poe poo pop por ppa ppe ppo ppp ppr pra pre pro prp prr ra- raa rae rao rap rar re- rea ree reo rep rer roa roe roo rop ror rpa rpe rpo rpp rpr rra rrp rrr