a-a a-t aaa aad aan aap aar aat ad- ada add adn adp adr adt an- ana and ann anp anr ant ap- apa apd apn app apr apt ar- ara ard arn arp arr art at- ata atd atn atp atr att daa dad dan dap dar dat dda ddd ddn ddp ddr ddt dna dnd dnn dnp dnr dnt dpa dpd dpn dpp dpr dpt dra drd drn drp drr drt dta dtd dtn dtp dtr dtt naa nad nan nap nar nat nda ndd ndn ndp ndr ndt nna nnn nnp nnt npa npd npn npp npr npt nra nrd nrn nrp nrr nrt nta ntd ntn ntp ntr ntt p-p paa pad pan pap par pat pda pdd pdn pdp pdr pdt pn- pna pnd pnn pnp pnr pnt ppa ppd ppn ppp ppr ppt pra prd prn prp prr prt pt- pta ptd ptn ptp ptr ptt ra- raa rad ran rap rar rat rda rdd rdn rdp rdr rdt rna rnd rnn rnp rnr rnt rpa rpd rpn rpp rpr rpt rra rrd rrn rrp rrr rrt rta rtd rtn rtp rtr rtt taa tad tan tap tar tat tda tdd tdn tdp tdr tdt tna tnd tnn tnp tnr tnt tpa tpd tpn tpp tpr tpt tra trd trn trp trr trt tta ttd ttn ttp ttr ttt