-er a-a aaa aae aak aap aar aav aea aee aek aep aer aev aka ake akk akp akr akv ap- apa ape apk app apr apv ar- ara are ark arp arr arv av- ava ave avk avp avr eaa eae eak eap ear eav eea eee eek eep eer eev eka eke ekp ekr ekv ep- epa epe epp epr era ere erk erp err erv eva eve evp evr evv ka- kaa kae kak kap kar kav ke- kea kee kek kep ker kev kke kkk kkp kkr kkv kpa kpe kpk kpp kpr kpv kra krk krp krr krv kva kvk kvp kvr kvv p-p paa pae pak pap par pav pea pee pek pep per pev pka pke pkp pkr ppa ppe ppk ppp ppr ppv pra pre prk prp prr prv pva pve pvk pvp pvr pvv ra- raa rae rak rap rar rav re- rea ree rek rep rer rev rke rkk rkp rkv rpa rpe rpk rpp rpr rpv rra rrk rrp rrr rva rve rvp rvr rvv v-a v-e vaa vae vak vap var vav vea vee vek vep ver vka vkp vpa vpe vpk vpp vpr vra vre vrk vrp vrr vva vvr vvv