-er -ey eee eef eep eer eet eey ef- efe eff efp efr eft ep- epe epf epp epr ept ere erf erp err ert ery ete etf etp etr ett ety eye eyp eyr eyt fee fef fep fer fet fey ffe fff ffp ffr fft ffy fpe fpp fpr fpt fpy fre frf frp frr frt fry fte ftf ftp ftr ftt fty fy- fye fyp p-p pee pef pep per pet pey pfe pff pfp pfr pft pfy ppe ppf ppp ppr ppt pre prf prp prr prt pry pt- pte ptf ptp ptr ptt pty py- pye pyf pyr pyt re- ree ref rep rer ret rey rfe rff rfp rfr rft rpe rpf rpp rpr rpt rrf rrp rrr rrt rte rtf rtp rtr rtt rty ry- rye ryf ryr ryy te- tee tef tep ter tet tey tfe tff tfp tfr tft tpe tpf tpp tpr tpt tre trf trp trr trt try tte ttf ttp ttr ttt tty tye tyf typ tyr tyt yee yef yep yer yet yey yfe yff yfr yft ypf yre yrf yrp yrt yte ytf ytp ytr ytt yye yyf yyt yyy