a-a aaa aad aan aap aar aav ad- ada add adn adp adr adv an- ana and ann anp anr anv ap- apa apd apn app apr apv ar- ara ard arn arp arr arv av- ava avd avn avp avr daa dad dan dap dar dav dda ddd ddn ddp ddr dna dnd dnn dnp dnr dpa dpd dpn dpp dpr dpv dra drd drn drp drr drv dva dvd dvn dvp dvr naa nad nan nap nar nav nda ndd ndn ndp ndr ndv nna nnn nnp nnv npa npd npn npp npr npv nra nrd nrn nrp nrr nrv nva nvd nvn nvp nvv p-p paa pad pan pap par pav pda pdd pdn pdp pdr pdv pn- pna pnd pnn pnp pnr pnv ppa ppd ppn ppp ppr ppv pra prd prn prp prr prv pva pvd pvn pvp pvr pvv ra- raa rad ran rap rar rav rda rdd rdn rdp rdr rdv rna rnd rnn rnp rnr rnv rpa rpd rpn rpp rpr rpv rra rrd rrn rrp rrr rva rvd rvn rvp rvr rvv v-a vaa vad van vap var vav vdd vdp vdr vdv vn- vna vnd vnp vnr vnv vpa vpd vpn vpp vpr vra vrd vrn vrp vrr vva vvr vvv