iii iir iis iiu ir- iri irr irs iru iry is- isi isr iss isu isy iu- iui iur ius iyr iys iyy rii rir ris riy rri rrr rrs rru rsi rsr rss rsu rui rur rus ruu ruy ry- ryr rys ryu ryy sii sir sis siu sr- sri srr srs sry ss- ssi ssr sss ssu sui sur sus suu suy sy- syi syr sys syu uii uir uis uiu ur- uri urr urs uru ury usi usr uss usu uur uus uuu uyi uys uyu yii yir yis yrs yru ysi ysr yss ysu ysy yui yur yus yuu yuy yys yyu yyy