-er -ey ddd dde ddi ddp ddr dds ddt ddy de- ded dee dei dep der des det dey di- did die dii dip dir dis dit diy dpd dpe dpi dpp dpr dps dpt drd dre dri drp drr drs drt dry dsd dse dsi dsp dsr dss dst dsy dtd dte dti dtp dtr dts dtt dty dy- dyd dye dyp dyr dys dyy ed- edd ede edi edp edr eds edt edy eed eee eep eer ees eet eey eid eie eii eip eir eis eit ep- epd epe epi epp epr eps ept erd ere eri erp err ers ert ery es- esd ese esi esp esr ess est esy etd ete eti etp etr ets ett ety eyd eye eyp eyr eys eyt i-d idd ide idi idp idr ids idt idy ie- ied iee iei iep ier ies iet iey iid iie iii iip iir iis iit ipd ipe ipi ipp ipr ips ipt ipy ir- ird ire iri irp irr irs irt iry is- isd ise isi isp isr iss ist isy itd ite iti itp its itt ity iye iyr iys iyt iyy p-p pdd pde pdi pdp pdr pds pdt ped pee pei pep per pes pet pey pid pie pii pip pir pis pit ppd ppe ppi ppp ppr pps ppt prd pre pri prp prr prs prt pry ps- psd pse psi psp psr pss pst psy pt- ptd pte pti ptp ptr pts ptt pty py- pyd pye pyr pys pyt rdd rde rdi rdp rdr rds rdt rdy re- red ree rei rep rer res ret rey rid rie rii rip rir ris rit riy rpd rpe rpi rpp rpr rps rpt rrd rri rrp rrr rrs rrt rsd rse rsi rsp rsr rss rst rtd rte rti rtp rtr rts rtt rty ry- ryd rye ryr rys ryy sdd sde sdi sdp sdr sds sdt sdy se- sed see sei sep ser ses set sey sid sie sii sip sir sis sit spd spe spi spp spr sps spt spy sr- srd sre sri srp srr srs srt sry ss- ssd sse ssi ssp ssr sss sst std ste sti stp str sts stt sty sy- syd sye syi syp syr sys syt tdd tde tdi tdp tdr tds tdt tdy te- ted tee tei tep ter tes tet tey tid tie tii tip tir tis tit tiy tpd tpe tpi tpp tpr tps tpt trd tre tri trp trr trs trt try tsd tse tsi tsp tsr tss tst tsy ttd tte tti ttp ttr tts ttt tty tyd tye typ tyr tys tyt yde yds ydt ydy yed yee yei yep yer yes yet yey yid yie yii yip yir yis yit ypd yps yre yrp yrs yrt yse ysi ysp ysr yss yst ysy ytd yte ytp ytr yts ytt yye yys yyt yyy