-er -ey ddd dde ddp ddr ddt ddy de- ded dee dep der det dey dpd dpe dpp dpr dpt drd dre drp drr drt dry dtd dte dtp dtr dtt dty dy- dyd dye dyp dyr dyy ed- edd ede edp edr edt edy eed eee eep eer eet eey ep- epd epe epp epr ept erd ere erp err ert ery etd ete etp etr ett ety eyd eye eyp eyr eyt p-p pdd pde pdp pdr pdt ped pee pep per pet pey ppd ppe ppp ppr ppt prd pre prp prr prt pry pt- ptd pte ptp ptr ptt pty py- pyd pye pyr pyt rdd rde rdp rdr rdt rdy re- red ree rep rer ret rey rpd rpe rpp rpr rpt rrd rrp rrr rrt rtd rte rtp rtr rtt rty ry- ryd rye ryr ryy tdd tde tdp tdr tdt tdy te- ted tee tep ter tet tey tpd tpe tpp tpr tpt trd tre trp trr trt try ttd tte ttp ttr ttt tty tyd tye typ tyr tyt yde ydt ydy yed yee yep yer yet yey ypd yre yrp yrt ytd yte ytp ytr ytt yye yyt yyy