a-a a-t aaa aan aap aar aat aax an- ana ann anp anr ant anx ap- apa apn app apr apt apx ar- ara arn arp arr art arx at- ata atn atp atr att atx ax- axa axn axp axr axt axx naa nan nap nar nat nax nna nnn nnp nnt npa npn npp npr npt nra nrn nrp nrr nrt nrx nta ntn ntp ntr ntt ntx nxt p-p paa pan pap par pat pax pn- pna pnn pnp pnr pnt pnx ppa ppn ppp ppr ppt ppx pra prn prp prr prt prx pt- pta ptn ptp ptr ptt ptx pxr pxt ra- raa ran rap rar rat rax rna rnn rnp rnr rnt rpa rpn rpp rpr rpt rpx rra rrn rrp rrr rrt rta rtn rtp rtr rtt rtx rxp rxr t-x taa tan tap tar tat tax tna tnn tnp tnr tnt tnx tpa tpn tpp tpr tpt tpx tra trn trp trr trt trx tta ttn ttp ttr ttt ttx txn txt xaa xan xap xar xat xna xpa xpn xpp xpt xrt xrx xtp xtr xtx xxp xxx