-ey eee eef eep eet eey ef- efe eff efp eft ep- epe epf epp ept ete etf etp ett ety eye eyp eyt fee fef fep fet fey ffe fff ffp fft ffy fpe fpp fpt fpy fte ftf ftp ftt fty fy- fye fyp p-p pee pef pep pet pey pfe pff pfp pft pfy ppe ppf ppp ppt pt- pte ptf ptp ptt pty py- pye pyf pyt te- tee tef tep tet tey tfe tff tfp tft tpe tpf tpp tpt tte ttf ttp ttt tty tye tyf typ tyt yee yef yep yet yey yfe yff yft ypf yte ytf ytp ytt yye yyf yyt yyy