-er ddd dde ddi ddk ddn ddp ddr dds ddt de- ded dee dei dek den dep der des det di- did die dii dik din dip dir dis dit dke dki dkk dkp dkr dks dkt dnd dne dni dnk dnn dnp dnr dns dnt dpd dpe dpi dpk dpn dpp dpr dps dpt drd dre dri drk drn drp drr drs drt dsd dse dsi dsk dsn dsp dsr dss dst dtd dte dti dtk dtn dtp dtr dts dtt ed- edd ede edi edk edn edp edr eds edt eed eee eek een eep eer ees eet eid eie eii eik ein eip eir eis eit ekd eke eki ekp ekr eks ekt en- end ene eni enk enn enp enr ens ent ep- epd epe epi epn epp epr eps ept erd ere eri erk ern erp err ers ert es- esd ese esi esk esn esp esr ess est etd ete eti etk etn etp etr ets ett i-d idd ide idi idk idn idp idr ids idt ie- ied iee iei iek ien iep ier ies iet iid iie iii iin iip iir iis iit ike iki ikk ikr iks ikt in- ind ine ini ink inn inp inr ins int ipd ipe ipi ipn ipp ipr ips ipt ir- ird ire iri irk irn irp irr irs irt is- isd ise isi isk isn isp isr iss ist itd ite iti itk itn itp its itt k-t kde kdk kdp kdr kds kdt ke- ked kee kei kek ken kep ker kes ket kid kie kii kik kin kip kir kis kit kke kki kkk kkn kkp kkr kks kkt kn- knd kne kni knk knn knp knr knt kpd kpe kpi kpk kpn kpp kpr kps kpt krd kri krk krn krp krr krs krt ksd kse ksi ksk ksn ksp ksr kss kst kte ktk ktn ktp ktr kts ktt n-i ndd nde ndi ndk ndn ndp ndr nds ndt ne- ned nee nei nek nen nep ner nes net nid nie nii nik nin nip nir nis nit nke nki nkk nkn nkp nkr nks nkt nne nni nnk nnn nnp nns nnt npd npe npi npn npp npr nps npt nrd nre nri nrk nrn nrp nrr nrs nrt nsd nse nsi nsk nsn nsp nsr nss nst ntd nte nti ntk ntn ntp ntr nts ntt p-p pdd pde pdi pdk pdn pdp pdr pds pdt ped pee pei pek pen pep per pes pet pid pie pii pik pin pip pir pis pit pkd pke pki pkn pkp pkr pks pkt pn- pnd pne pni pnk pnn pnp pnr pns pnt ppd ppe ppi ppk ppn ppp ppr pps ppt prd pre pri prk prn prp prr prs prt ps- psd pse psi psk psn psp psr pss pst pt- ptd pte pti ptk ptn ptp ptr pts ptt rdd rde rdi rdn rdp rdr rds rdt re- red ree rei rek ren rep rer res ret rid rie rii rik rin rip rir ris rit rke rkk rkp rks rkt rnd rni rnn rnp rnr rns rnt rpd rpe rpi rpk rpn rpp rpr rps rpt rrd rri rrk rrn rrp rrr rrs rrt rsd rse rsi rsk rsn rsp rsr rss rst rtd rte rti rtk rtn rtp rtr rts rtt sdd sde sdi sdk sdn sdp sdr sds sdt se- sed see sei sek sen sep ser ses set sid sie sii sik sin sip sir sis sit sk- skd ske ski skk skp skr sks skt snd sne sni snk snn snp snr sns snt spd spe spi spk spn spp spr sps spt sr- srd sre sri srk srn srp srr srs srt ss- ssd sse ssi ssk ssn ssp ssr sss sst std ste sti stk stn stp str sts stt tdd tde tdi tdk tdn tdp tdr tds tdt te- ted tee tei tek ten tep ter tes tet tid tie tii tik tin tip tir tis tit tke tkk tkp tkr tks tkt tnd tne tni tnk tnn tnp tnr tns tnt tpd tpe tpi tpk tpn tpp tpr tps tpt trd tre tri trk trn trp trr trs trt tsd tse tsi tsk tsn tsp tsr tss tst ttd tte tti ttk ttn ttp ttr tts ttt