-er a-a aaa aae aao aap aar aav aea aee aeo aep aer aev aoa aoe aoo aop aor aov ap- apa ape apo app apr apv ar- ara are aro arp arr arv av- ava ave avo avp avr eaa eae eao eap ear eav eea eee eeo eep eer eev eo- eoa eoe eoo eop eor ep- epa epe epo epp epr era ere ero erp err erv eva eve evo evp evr evv oaa oae oao oap oar oav oea oee oeo oep oer oo- ooa ooo oop oor oov op- opa ope opo opp opr opv or- ora ore oro orp orr orv ov- ova ove ovo ovp ovv p-p paa pae pao pap par pav pea pee peo pep per pev poa poe poo pop por pov ppa ppe ppo ppp ppr ppv pra pre pro prp prr prv pva pve pvo pvp pvr pvv ra- raa rae rao rap rar rav re- rea ree reo rep rer rev roa roe roo rop ror rov rpa rpe rpo rpp rpr rpv rra rrp rrr rva rve rvo rvp rvr rvv v-a v-e vaa vae vao vap var vav vea vee veo vep ver voa voe voo vop vor vov vpa vpe vpo vpp vpr vra vre vrp vrr vva vvo vvr vvv