a-a a-t aaa aad aap aar aat aax ad- ada add adp adr adt adx ap- apa apd app apr apt apx ar- ara ard arp arr art arx at- ata atd atp atr att atx ax- axa axp axr axt axx daa dad dap dar dat dax dda ddd ddp ddr ddt ddx dpa dpd dpp dpr dpt dra drd drp drr drt drx dta dtd dtp dtr dtt dtx dxd dxp dxr dxt dxx p-p paa pad pap par pat pax pda pdd pdp pdr pdt pdx ppa ppd ppp ppr ppt ppx pra prd prp prr prt prx pt- pta ptd ptp ptr ptt ptx pxr pxt ra- raa rad rap rar rat rax rda rdd rdp rdr rdt rdx rpa rpd rpp rpr rpt rpx rra rrd rrp rrr rrt rta rtd rtp rtr rtt rtx rxp rxr t-x taa tad tap tar tat tax tda tdd tdp tdr tdt tdx tpa tpd tpp tpr tpt tpx tra trd trp trr trt trx tta ttd ttp ttr ttt ttx txt xaa xad xap xar xat xda xdr xdt xpa xpd xpp xpt xrd xrt xrx xtp xtr xtx xxp xxx