-er -ey eee eep eer ees eet eey eie eii eip eir eis eit ep- epe epi epp epr eps ept ere eri erp err ers ert ery es- ese esi esp esr ess est esy ete eti etp etr ets ett ety eye eyp eyr eys eyt ie- iee iei iep ier ies iet iey iie iii iip iir iis iit ipe ipi ipp ipr ips ipt ipy ir- ire iri irp irr irs irt iry is- ise isi isp isr iss ist isy ite iti itp its itt ity iye iyr iys iyt iyy p-p pee pei pep per pes pet pey pie pii pip pir pis pit ppe ppi ppp ppr pps ppt pre pri prp prr prs prt pry ps- pse psi psp psr pss pst psy pt- pte pti ptp ptr pts ptt pty py- pye pyr pys pyt re- ree rei rep rer res ret rey rie rii rip rir ris rit riy rpe rpi rpp rpr rps rpt rri rrp rrr rrs rrt rse rsi rsp rsr rss rst rte rti rtp rtr rts rtt rty ry- rye ryr rys ryy se- see sei sep ser ses set sey sie sii sip sir sis sit spe spi spp spr sps spt spy sr- sre sri srp srr srs srt sry ss- sse ssi ssp ssr sss sst ste sti stp str sts stt sty sy- sye syi syp syr sys syt te- tee tei tep ter tes tet tey tie tii tip tir tis tit tiy tpe tpi tpp tpr tps tpt tre tri trp trr trs trt try tse tsi tsp tsr tss tst tsy tte tti ttp ttr tts ttt tty tye typ tyr tys tyt yee yei yep yer yes yet yey yie yii yip yir yis yit yps yre yrp yrs yrt yse ysi ysp ysr yss yst ysy yte ytp ytr yts ytt yye yys yyt yyy