-er ddd dde ddf ddi ddk ddm ddp ddr dds de- ded dee def dei dek dem dep der des dfd dfe dff dfi dfk dfm dfp dfr dfs di- did die dif dii dik dim dip dir dis dke dki dkk dkm dkp dkr dks dmd dme dmf dmi dmk dmm dmp dmr dms dpd dpe dpf dpi dpk dpm dpp dpr dps drd dre dri drk drm drp drr drs dsd dse dsf dsi dsk dsm dsp dsr dss ed- edd ede edf edi edk edm edp edr eds eed eee eef eek eem eep eer ees ef- efd efe eff efi efm efp efr efs eid eie eif eii eik eim eip eir eis ekd eke ekf eki ekp ekr eks em- emd eme emf emi emk emm emp emr ems ep- epd epe epf epi epm epp epr eps erd ere erf eri erk erm erp err ers es- esd ese esf esi esk esm esp esr ess fdd fde fdf fdi fdk fdm fdp fdr fds fed fee fef fei fek fem fep fer fes ffd ffe fff ffi ffk ffm ffp ffr ffs fid fie fif fii fik fim fip fir fis fkf fki fkk fkm fkp fmd fme fmf fmi fmm fmp fmr fms fpd fpe fpi fpk fpm fpp fpr fps frd fre frf fri frk frm frp frr frs fsd fse fsf fsi fsk fsm fsp fsr fss i-d i-f idd ide idf idi idk idm idp idr ids ie- ied iee ief iei iek iem iep ier ies ifd ife iff ifi ifm ifp ifr ifs iid iie iif iii iim iip iir iis ike ikf iki ikk ikr iks im- imd ime imf imi imm imp ims ipd ipe ipf ipi ipm ipp ipr ips ir- ird ire irf iri irk irm irp irr irs is- isd ise isf isi isk ism isp isr iss kde kdf kdk kdm kdp kdr kds ke- ked kee kef kei kek kem kep ker kes kfd kff kfi kfm kfs kid kie kif kii kik kim kip kir kis kke kki kkk kkm kkp kkr kks kmd kme kmf kmi kmk kmm kmp kms kpd kpe kpf kpi kpk kpm kpp kpr kps krd krf kri krk krp krr krs ksd kse ksf ksi ksk ksm ksp ksr kss m-f m-r mdd mde mdf mdi mdk mdm mdp mdr mds med mee mef mei mek mem mep mer mes mfd mfe mff mfi mfm mfp mfr mfs mi- mid mie mif mii mik mim mip mir mis mkd mke mkk mkm mkp mkr mks mmd mme mmf mmi mmk mmm mmp mmr mms mpd mpe mpf mpi mpk mpm mpp mpr mps mrd mre mrf mri mrk mrm mrp mrr mrs msd mse msf msi msk msm msp msr mss p-p pdd pde pdf pdi pdk pdm pdp pdr pds ped pee pef pei pek pem pep per pes pfd pfe pff pfi pfk pfm pfp pfr pfs pid pie pif pii pik pim pip pir pis pkd pke pkf pki pkm pkp pkr pks pmd pme pmf pmi pmk pmm pmp pmr pms ppd ppe ppf ppi ppk ppm ppp ppr pps prd pre prf pri prk prm prp prr prs ps- psd pse psf psi psk psm psp psr pss rdd rde rdf rdi rdm rdp rdr rds re- red ree ref rei rek rem rep rer res rfd rfe rff rfi rfk rfm rfp rfr rfs rid rie rif rii rik rim rip rir ris rke rkf rkk rkm rkp rks rmd rme rmf rmi rmm rmp rmr rms rpd rpe rpf rpi rpk rpm rpp rpr rps rrd rrf rri rrk rrm rrp rrr rrs rsd rse rsf rsi rsk rsm rsp rsr rss sdd sde sdf sdi sdk sdm sdp sdr sds se- sed see sef sei sek sem sep ser ses sfd sfe sff sfi sfk sfm sfp sfr sfs sid sie sif sii sik sim sip sir sis sk- skd ske skf ski skk skm skp skr sks smd sme smf smi smk smm smp smr sms spd spe spf spi spk spm spp spr sps sr- srd sre srf sri srk srm srp srr srs ss- ssd sse ssf ssi ssk ssm ssp ssr sss