-er a-a aaa aae aap aar aav aea aee aep aer aev ap- apa ape app apr apv ar- ara are arp arr arv av- ava ave avp avr eaa eae eap ear eav eea eee eep eer eev ep- epa epe epp epr era ere erp err erv eva eve evp evr evv p-p paa pae pap par pav pea pee pep per pev ppa ppe ppp ppr ppv pra pre prp prr prv pva pve pvp pvr pvv ra- raa rae rap rar rav re- rea ree rep rer rev rpa rpe rpp rpr rpv rra rrp rrr rva rve rvp rvr rvv v-a v-e vaa vae vap var vav vea vee vep ver vpa vpe vpp vpr vra vre vrp vrr vva vvr vvv