-er ddd dde ddo ddp ddr dds ddt ddz de- ded dee deo dep der des det dez dod doe doo dop dor dos dot doz dpd dpe dpo dpp dpr dps dpt dpz drd dre dro drp drr drs drt drz dsd dse dso dsp dsr dss dst dsz dtd dte dto dtp dtr dts dtt dtz dzd dze dzo dzp dzr dzs ed- edd ede edo edp edr eds edt eed eee eeo eep eer ees eet eo- eod eoe eoo eop eor eos eot ep- epd epe epo epp epr eps ept epz erd ere ero erp err ers ert erz es- esd ese eso esp esr ess est etd ete eto etp etr ets ett etz eze ezo ezr ezs ezz odd ode odo odp odr ods odt oed oee oeo oep oer oes oet oo- ood ooo oop oor oos oot op- opd ope opo opp opr ops opt or- ord ore oro orp orr ors ort orz os- osd ose oso osp osr oss ost ot- otd ote oto otp otr ots ott otz oze ozo ozs ozt ozz p-p pdd pde pdo pdp pdr pds pdt pdz ped pee peo pep per pes pet pez pod poe poo pop por pos pot poz ppd ppe ppo ppp ppr pps ppt ppz prd pre pro prp prr prs prt prz ps- psd pse pso psp psr pss pst pt- ptd pte pto ptp ptr pts ptt ptz pzp pzt rdd rde rdo rdp rdr rds rdt re- red ree reo rep rer res ret rez rod roe roo rop ror ros rot roz rpd rpe rpo rpp rpr rps rpt rpz rrd rrp rrr rrs rrt rsd rse rso rsp rsr rss rst rtd rte rto rtp rtr rts rtt rtz rze rzo sdd sde sdo sdp sdr sds sdt sdz se- sed see seo sep ser ses set sez sod soe soo sop sor sos sot soz spd spe spo spp spr sps spt spz sr- srd sre sro srp srr srs srt ss- ssd sse sso ssp ssr sss sst ssz std ste sto stp str sts stt stz szd sze szp szr tdd tde tdo tdp tdr tds tdt te- ted tee teo tep ter tes tet tez to- tod toe too top tor tos tot toz tpd tpe tpo tpp tpr tps tpt tpz trd tre tro trp trr trs trt trz tsd tse tso tsp tsr tss tst ttd tte tto ttp ttr tts ttt tzd tze tzs zds zdt zed zee zeo zep zer zes zet zez zo- zod zoe zoo zor zos zot zpe zpo zpp zpr zpt zro zrp zrs zse zst zsz zte ztr zzr zzs zzt zzz