a-a aaa aan aap aar aav an- ana ann anp anr anv ap- apa apn app apr apv ar- ara arn arp arr arv av- ava avn avp avr naa nan nap nar nav nna nnn nnp nnv npa npn npp npr npv nra nrn nrp nrr nrv nva nvn nvp nvv p-p paa pan pap par pav pn- pna pnn pnp pnr pnv ppa ppn ppp ppr ppv pra prn prp prr prv pva pvn pvp pvr pvv ra- raa ran rap rar rav rna rnn rnp rnr rnv rpa rpn rpp rpr rpv rra rrn rrp rrr rva rvn rvp rvr rvv v-a vaa van vap var vav vn- vna vnp vnr vnv vpa vpn vpp vpr vra vrn vrp vrr vva vvr vvv