a-a a-t aaa aao aap aat aay aoa aoo aop aot ap- apa apo app apt apy at- ata ato atp att ay- aya ayo ayp ayt oaa oao oap oat oo- ooa ooo oop oot op- opa opo opp opt opy ot- ota oto otp ott oya oyo p-p paa pao pap pat pay poa poo pop pot poy ppa ppo ppp ppt pt- pta pto ptp ptt pty py- pya pyo pyt taa tao tap tat tay to- toa too top tot toy tpa tpo tpp tpt tta tto ttp ttt tty tya tyo typ tyt yaa yao yap yat yay yoo yop yot yoy ypa ypo yta yto ytp ytt yyt yyy