a-a a-t aaa aaf aap aat aay af- afa aff afp aft afy ap- apa apf app apt apy at- ata atf atp att ay- aya ayf ayp ayt faa faf fap fat fay ffa fff ffp fft ffy fpa fpp fpt fpy fta ftf ftp ftt fty fy- fya fyp p-p paa paf pap pat pay pfa pff pfp pft pfy ppa ppf ppp ppt pt- pta ptf ptp ptt pty py- pya pyf pyt taa taf tap tat tay tfa tff tfp tft tpa tpf tpp tpt tta ttf ttp ttt tty tya tyf typ tyt yaa yaf yap yat yay yfa yff yft ypa ypf yta ytf ytp ytt yyf yyt yyy