a-a aaa aao aap aar aas aay aoa aoo aop aor aos ap- apa apo app apr aps apy ar- ara aro arp arr ars ary as- asa aso asp asr ass asy ay- aya ayo ayp ayr ays oaa oao oap oar oas oo- ooa ooo oop oor oos op- opa opo opp opr ops opy or- ora oro orp orr ors ory os- osa oso osp osr oss oya oyo oys p-p paa pao pap par pas pay poa poo pop por pos poy ppa ppo ppp ppr pps pra pro prp prr prs pry ps- psa pso psp psr pss psy py- pya pyo pyr pys ra- raa rao rap rar ras ray roa roo rop ror ros roy rpa rpo rpp rpr rps rra rrp rrr rrs rsa rso rsp rsr rss ry- rya ryo ryr rys ryy saa sao sap sar sas say soa soo sop sor sos soy spa spo spp spr sps spy sr- sra sro srp srr srs sry ss- ssa sso ssp ssr sss sy- sya syp syr sys yaa yao yap yar yas yay yoo yop yor yos yoy ypa ypo yps yra yro yrp yrs ysa yso ysp ysr yss ysy yys yyy