-er ddd dde ddg ddi ddo ddp ddr dds ddt de- ded dee deg dei deo dep der des det dgd dge dgg dgi dgp dgr dgs dgt di- did die dig dii dio dip dir dis dit dod doe dog doi doo dop dor dos dot dpd dpe dpg dpi dpo dpp dpr dps dpt drd dre drg dri dro drp drr drs drt dsd dse dsg dsi dso dsp dsr dss dst dtd dte dtg dti dto dtp dtr dts dtt ed- edd ede edg edi edo edp edr eds edt eed eee eeg eeo eep eer ees eet egd ege egg egi ego egp egr egs egt eid eie eig eii eio eip eir eis eit eo- eod eoe eog eoi eoo eop eor eos eot ep- epd epe epg epi epo epp epr eps ept erd ere erg eri ero erp err ers ert es- esd ese esg esi eso esp esr ess est etd ete etg eti eto etp etr ets ett g-d g-p gdd gde gdi gdo gdp gdr gds gdt ge- ged gee geg gei geo gep ger ges get ggd ggg ggi ggo ggp ggr ggs ggt gid gie gig gii gio gip gir gis git god goe gog goi goo gop gor gos got gpd gpe gpg gpi gpo gpp gpr gps gpt grd gre grg gri gro grp grr grs grt gsd gse gsg gsi gso gsp gsr gss gst gtd gte gtg gti gto gtp gtr gts gtt i-d idd ide idg idi ido idp idr ids idt ie- ied iee ieg iei iep ier ies iet igd ige igg igi igo igp igr igs igt iid iie iii iio iip iir iis iit io- iod ioe iog ioi ioo iop ior ios iot ipd ipe ipg ipi ipo ipp ipr ips ipt ir- ird ire irg iri iro irp irr irs irt is- isd ise isg isi iso isp isr iss ist itd ite itg iti ito itp its itt o-i odd ode odg odi odo odp odr ods odt oed oee oeg oei oeo oep oer oes oet ogd oge ogg ogi ogo ogp ogs ogt oid oie oii oio oip oir ois oit oo- ood oog ooi ooo oop oor oos oot op- opd ope opg opi opo opp opr ops opt or- ord ore org ori oro orp orr ors ort os- osd ose osg osi oso osp osr oss ost ot- otd ote otg oti oto otp otr ots ott p-p pdd pde pdg pdi pdo pdp pdr pds pdt ped pee peg pei peo pep per pes pet pgd pge pgg pgi pgo pgp pgr pgs pgt pid pie pig pii pio pip pir pis pit pod poe pog poi poo pop por pos pot ppd ppe ppg ppi ppo ppp ppr pps ppt prd pre prg pri pro prp prr prs prt ps- psd pse psg psi pso psp psr pss pst pt- ptd pte ptg pti pto ptp ptr pts ptt rdd rde rdg rdi rdo rdp rdr rds rdt re- red ree reg rei reo rep rer res ret rgd rge rgg rgi rgo rgp rgr rgs rgt rid rie rig rii rio rip rir ris rit rod roe rog roi roo rop ror ros rot rpd rpe rpg rpi rpo rpp rpr rps rpt rrd rrg rri rrp rrr rrs rrt rsd rse rsg rsi rso rsp rsr rss rst rtd rte rtg rti rto rtp rtr rts rtt sdd sde sdg sdi sdo sdp sdr sds sdt se- sed see seg sei seo sep ser ses set sgd sge sgg sgi sgo sgp sgr sgs sgt sid sie sig sii sio sip sir sis sit sod soe sog soi soo sop sor sos sot spd spe spg spi spo spp spr sps spt sr- srd sre srg sri sro srp srr srs srt ss- ssd sse ssg ssi sso ssp ssr sss sst std ste stg sti sto stp str sts stt tdd tde tdg tdi tdo tdp tdr tds tdt te- ted tee teg tei teo tep ter tes tet tge tgg tgi tgo tgp tgr tgs tgt tid tie tig tii tio tip tir tis tit to- tod toe tog toi too top tor tos tot tpd tpe tpg tpi tpo tpp tpr tps tpt trd tre trg tri tro trp trr trs trt tsd tse tsg tsi tso tsp tsr tss tst ttd tte ttg tti tto ttp ttr tts ttt