iii iip iir iis iit ipi ipp ipr ips ipt ipy ir- iri irp irr irs irt iry is- isi isp isr iss ist isy iti itp its itt ity iyr iys iyt iyy p-p pii pip pir pis pit ppi ppp ppr pps ppt pri prp prr prs prt pry ps- psi psp psr pss pst psy pt- pti ptp ptr pts ptt pty py- pyr pys pyt rii rip rir ris rit riy rpi rpp rpr rps rpt rri rrp rrr rrs rrt rsi rsp rsr rss rst rti rtp rtr rts rtt rty ry- ryr rys ryy sii sip sir sis sit spi spp spr sps spt spy sr- sri srp srr srs srt sry ss- ssi ssp ssr sss sst sti stp str sts stt sty sy- syi syp syr sys syt tii tip tir tis tit tiy tpi tpp tpr tps tpt tri trp trr trs trt try tsi tsp tsr tss tst tsy tti ttp ttr tts ttt tty typ tyr tys tyt yii yip yir yis yit yps yrp yrs yrt ysi ysp ysr yss yst ysy ytp ytr yts ytt yys yyt yyy