iii iio iir iis iki ikk iko ikr iks io- ioi ioo ior ios ir- iri irk iro irr irs iry is- isi isk iso isr iss isy iyo iyr iys iyy kii kik kio kir kis kki kkk kkr kks kky koi kok koo kor kos koy kri krk kro krr krs kry ksi ksk kso ksr kss kyo kyr kys o-i oii oik oio oir ois oki okk oko okr oks oo- ooi ook ooo oor oos or- ori ork oro orr ors ory os- osi osk oso osr oss oyi oyo oys rii rik rio rir ris riy rkk rko rks rky roi rok roo ror ros roy rri rrk rrr rrs rsi rsk rso rsr rss ry- ryk ryo ryr rys ryy sii sik sio sir sis sk- ski skk sko skr sks sky soi sok soo sor sos soy sr- sri srk sro srr srs sry ss- ssi ssk sso ssr sss sy- syi syk syr sys yii yio yir yis yki ykk yoi yok yoo yor yos yoy yro yrs ysi ysk yso ysr yss ysy yys yyy