-er ddd dde ddk ddn ddo ddp ddr dds de- ded dee dek den deo dep der des dev dke dkk dko dkp dkr dks dnd dne dnk dnn dno dnp dnr dns dod doe dok don doo dop dor dos dov dpd dpe dpk dpn dpo dpp dpr dps dpv drd dre drk drn dro drp drr drs drv dsd dse dsk dsn dso dsp dsr dss dsv dvd dve dvk dvn dvp dvr dvs ed- edd ede edk edn edo edp edr eds eed eee eek een eeo eep eer ees eev ekd eke eko ekp ekr eks ekv en- end ene enk enn eno enp enr ens env eo- eod eoe eok eon eoo eop eor eos ep- epd epe epn epo epp epr eps erd ere erk ern ero erp err ers erv es- esd ese esk esn eso esp esr ess esv evd eve evn evo evp evr evs evv kde kdk kdo kdp kdr kds ke- ked kee kek ken keo kep ker kes kev kke kkk kkn kkp kkr kks kkv kn- knd kne knk knn kno knp knr kod koe kok kon koo kop kor kos kpd kpe kpk kpn kpo kpp kpr kps kpv krd krk krn kro krp krr krs krv ksd kse ksk ksn kso ksp ksr kss ksv kvk kvn kvo kvp kvr kvs kvv ndd nde ndk ndn ndo ndp ndr nds ndv ne- ned nee nek nen neo nep ner nes nev nke nkk nkn nko nkp nkr nks nne nnk nnn nno nnp nns nnv no- nod noe nok non noo nop nor nos nov npd npe npn npo npp npr nps npv nrd nre nrk nrn nro nrp nrr nrs nrv nsd nse nsk nsn nso nsp nsr nss nsv nvd nve nvk nvn nvp nvv odd ode odn odo odp odr ods odv oed oee oen oeo oep oer oes okd oke okk oko okp okr oks on- ond one onk onn ono onp onr ons oo- ood ook oon ooo oop oor oos oov op- opd ope opk opn opo opp opr ops opv or- ord ore ork orn oro orp orr ors orv os- osd ose osk osn oso osp osr oss osv ov- ovd ove ovo ovp ovs ovv p-p pdd pde pdk pdn pdo pdp pdr pds pdv ped pee pek pen peo pep per pes pev pkd pke pkn pko pkp pkr pks pn- pnd pne pnk pnn pno pnp pnr pns pnv pod poe pok pon poo pop por pos pov ppd ppe ppk ppn ppo ppp ppr pps ppv prd pre prk prn pro prp prr prs prv ps- psd pse psk psn pso psp psr pss psv pvd pve pvk pvn pvo pvp pvr pvs pvv rdd rde rdn rdo rdp rdr rds rdv re- red ree rek ren reo rep rer res rev rke rkk rko rkp rks rkv rnd rnn rno rnp rnr rns rnv rod roe rok ron roo rop ror ros rov rpd rpe rpk rpn rpo rpp rpr rps rpv rrd rrk rrn rrp rrr rrs rsd rse rsk rsn rso rsp rsr rss rsv rvd rve rvn rvo rvp rvr rvs rvv sdd sde sdk sdn sdo sdp sdr sds sdv se- sed see sek sen seo sep ser ses sev sk- skd ske skk sko skp skr sks snd sne snk snn sno snp snr sns snv sod soe sok son soo sop sor sos sov spd spe spk spn spo spp spr sps spv sr- srd sre srk srn sro srp srr srs srv ss- ssd sse ssk ssn sso ssp ssr sss ssv svd sve svk svn svo svp svr svs svv v-e vdd vde vdk vdo vdp vdr vds vdv ved vee vek ven veo vep ver ves vkp vn- vnd vno vnp vnr vns vnv vod voe vok von voo vop vor vos vov vpd vpe vpk vpn vpo vpp vpr vps vrd vre vrk vrn vrp vrr vrs vsd vse vsk vsn vso vsp vsr vss vsv vvo vvr vvs vvv