-er ddd dde ddg ddi ddn ddo ddp ddr dds de- ded dee deg dei den deo dep der des dgd dge dgg dgi dgn dgp dgr dgs di- did die dig dii din dio dip dir dis dnd dne dng dni dnn dno dnp dnr dns dod doe dog doi don doo dop dor dos dpd dpe dpg dpi dpn dpo dpp dpr dps drd dre drg dri drn dro drp drr drs dsd dse dsg dsi dsn dso dsp dsr dss ed- edd ede edg edi edn edo edp edr eds eed eee eeg een eeo eep eer ees egd ege egg egi egn ego egp egr egs eid eie eig eii ein eio eip eir eis en- end ene eng eni enn eno enp enr ens eo- eod eoe eog eoi eon eoo eop eor eos ep- epd epe epg epi epn epo epp epr eps erd ere erg eri ern ero erp err ers es- esd ese esg esi esn eso esp esr ess g-d g-p gdd gde gdi gdn gdo gdp gdr gds ge- ged gee geg gei gen geo gep ger ges ggd ggg ggi ggn ggo ggp ggr ggs gid gie gig gii gin gio gip gir gis gnd gne gni gnn gno gnp gnr gns god goe gog goi gon goo gop gor gos gpd gpe gpg gpi gpn gpo gpp gpr gps grd gre grg gri grn gro grp grr grs gsd gse gsg gsi gsn gso gsp gsr gss i-d idd ide idg idi idn ido idp idr ids ie- ied iee ieg iei ien iep ier ies igd ige igg igi ign igo igp igr igs iid iie iii iin iio iip iir iis in- ind ine ing ini inn ino inp inr ins io- iod ioe iog ioi ion ioo iop ior ios ipd ipe ipg ipi ipn ipo ipp ipr ips ir- ird ire irg iri irn iro irp irr irs is- isd ise isg isi isn iso isp isr iss n-i ndd nde ndg ndi ndn ndo ndp ndr nds ne- ned nee neg nei nen neo nep ner nes ngd nge ngg ngi ngn ngo ngp ngs nid nie nig nii nin nio nip nir nis nne nng nni nnn nno nnp nns no- nod noe nog noi non noo nop nor nos npd npe npg npi npn npo npp npr nps nrd nre nrg nri nrn nro nrp nrr nrs nsd nse nsg nsi nsn nso nsp nsr nss o-i odd ode odg odi odn odo odp odr ods oed oee oeg oei oen oeo oep oer oes ogd oge ogg ogi ogn ogo ogp ogs oid oie oii oin oio oip oir ois on- ond one ong oni onn ono onp onr ons oo- ood oog ooi oon ooo oop oor oos op- opd ope opg opi opn opo opp opr ops or- ord ore org ori orn oro orp orr ors os- osd ose osg osi osn oso osp osr oss p-p pdd pde pdg pdi pdn pdo pdp pdr pds ped pee peg pei pen peo pep per pes pgd pge pgg pgi pgn pgo pgp pgr pgs pid pie pig pii pin pio pip pir pis pn- pnd pne png pni pnn pno pnp pnr pns pod poe pog poi pon poo pop por pos ppd ppe ppg ppi ppn ppo ppp ppr pps prd pre prg pri prn pro prp prr prs ps- psd pse psg psi psn pso psp psr pss rdd rde rdg rdi rdn rdo rdp rdr rds re- red ree reg rei ren reo rep rer res rgd rge rgg rgi rgn rgo rgp rgr rgs rid rie rig rii rin rio rip rir ris rnd rng rni rnn rno rnp rnr rns rod roe rog roi ron roo rop ror ros rpd rpe rpg rpi rpn rpo rpp rpr rps rrd rrg rri rrn rrp rrr rrs rsd rse rsg rsi rsn rso rsp rsr rss sdd sde sdg sdi sdn sdo sdp sdr sds se- sed see seg sei sen seo sep ser ses sgd sge sgg sgi sgn sgo sgp sgr sgs sid sie sig sii sin sio sip sir sis snd sne sng sni snn sno snp snr sns sod soe sog soi son soo sop sor sos spd spe spg spi spn spo spp spr sps sr- srd sre srg sri srn sro srp srr srs ss- ssd sse ssg ssi ssn sso ssp ssr sss