a-a aaa aap aar aav aay ap- apa app apr apv apy ar- ara arp arr arv ary av- ava avp avr avy ay- aya ayp ayr p-p paa pap par pav pay ppa ppp ppr ppv pra prp prr prv pry pva pvp pvr pvv py- pya pyr ra- raa rap rar rav ray rpa rpp rpr rpv rra rrp rrr rva rvp rvr rvv rvy ry- rya ryr ryy v-a vaa vap var vav vay vpa vpp vpr vra vrp vrr vry vva vvr vvv vyp yaa yap yar yav yay ypa yra yrp yva yvr yvy yyy