a-a aaa aao aap aas aay aoa aoo aop aos ap- apa apo app aps apy as- asa aso asp ass asy ay- aya ayo ayp ays oaa oao oap oas oo- ooa ooo oop oos op- opa opo opp ops opy os- osa oso osp oss oya oyo oys p-p paa pao pap pas pay poa poo pop pos poy ppa ppo ppp pps ps- psa pso psp pss psy py- pya pyo pys saa sao sap sas say soa soo sop sos soy spa spo spp sps spy ss- ssa sso ssp sss sy- sya syp sys yaa yao yap yas yay yoo yop yos yoy ypa ypo yps ysa yso ysp yss ysy yys yyy