-er -th ddd dde ddh ddp ddr ddt de- ded dee deh dep der det dh- dhd dhe dhh dhp dhr dht dpd dpe dph dpp dpr dpt drd dre drp drr drt dtd dte dth dtp dtr dtt ed- edd ede edh edp edr edt eed eee eep eer eet ehd ehe ehh ehp ehr eht ep- epd epe eph epp epr ept erd ere erh erp err ert etd ete eth etp etr ett hdd hde hdh hdp hdr hdt he- hed hee heh hep her het hhd hhe hhh hhp hhr hht hpd hpe hph hpp hpr hpt hr- hrd hre hrh hrp hrr hrt htd hte hth htp htr htt p-p pdd pde pdh pdp pdr pdt ped pee peh pep per pet phd phe php phr pht ppd ppe pph ppp ppr ppt prd pre prh prp prr prt pt- ptd pte pth ptp ptr ptt rdd rde rdh rdp rdr rdt re- red ree reh rep rer ret rh- rhd rhe rhh rhp rhr rht rpd rpe rph rpp rpr rpt rrd rrh rrp rrr rrt rtd rte rtp rtr rtt tdd tde tdh tdp tdr tdt te- ted tee teh tep ter tet th- thd the thh thp thr tht tpd tpe tph tpp tpr tpt trd tre trh trp trr trt ttd tte tth ttp ttr ttt