-er -ol ddd dde ddi ddk ddl ddo ddr dds de- ded dee dei dek del deo der des dev di- did die dii dik dil dio dir dis div dke dki dkk dkl dko dkr dks dl- dld dle dli dlk dll dlo dlr dls dlv dod doe doi dok dol doo dor dos dov drd dre dri drk drl dro drr drs drv dsd dse dsi dsk dsl dso dsr dss dsv dvd dve dvi dvk dvl dvr dvs ed- edd ede edi edk edl edo edr eds eed eee eek eel eeo eer ees eev eid eie eii eik eil eio eir eis eiv ekd eke eki ekl eko ekr eks ekv eld ele eli elk ell elo elr els elv eo- eod eoe eoi eok eol eoo eor eos erd ere eri erk erl ero err ers erv es- esd ese esi esk esl eso esr ess esv evd eve evi evl evo evr evs evv i-d i-v idd ide idi idk idl ido idr ids idv ie- ied iee iei iek iel ier ies iev iid iie iii iil iio iir iis ike iki ikk ikl iko ikr iks ikv il- ild ile ili ilk ill ilo ilr ils ilv io- iod ioe ioi iol ioo ior ios iov ir- ird ire iri irk irl iro irr irs irv is- isd ise isi isk isl iso isr iss isv ivd ive ivi ivl ivo ivr ivs ivv kde kdk kdl kdo kdr kds ke- ked kee kei kek kel keo ker kes kev kid kie kii kik kil kio kir kis kiv kke kki kkk kkl kkr kks kkv kl- kld kli klo klr kls klv kod koe koi kok kol koo kor kos krd kri krk krl kro krr krs krv ksd kse ksi ksk ksl kso ksr kss ksv kvi kvk kvo kvr kvs kvv ldd lde ldi ldk ldl ldo ldr lds ldv led lee lei lek lel leo ler les lev lid lie lii lik lil lio lir lis liv lkl lkr lks lld lle lli llk lll llo llr lls llv lod loe loi lok lol loo lor los lov lrd lri lrk lro lrr lrs lrv lsd lse lsi lsk lsl lso lsr lss lsv lvd lve lvi lvl lvr lvs lvv o-i odd ode odi odl odo odr ods odv oed oee oei oel oeo oer oes oid oie oii oik oil oio oir ois oiv okd oke oki okk okl oko okr oks old ole oli olk oll olo ols oo- ood ooi ook ool ooo oor oos oov or- ord ore ori ork orl oro orr ors orv os- osd ose osi osk osl oso osr oss osv ov- ovd ove ovi ovl ovo ovs ovv rdd rde rdi rdl rdo rdr rds rdv re- red ree rei rek rel reo rer res rev rid rie rii rik ril rio rir ris riv rke rkk rko rks rkv rld rle rli rll rlo rlr rls rod roe roi rok rol roo ror ros rov rrd rri rrk rrl rrr rrs rsd rse rsi rsk rsl rso rsr rss rsv rvd rve rvi rvl rvo rvr rvs rvv sdd sde sdi sdk sdl sdo sdr sds sdv se- sed see sei sek sel seo ser ses sev sid sie sii sik sil sio sir sis siv sk- skd ske ski skk skl sko skr sks sld sle sli slk sll slo slr sls slv sod soe soi sok sol soo sor sos sov sr- srd sre sri srk srl sro srr srs srv ss- ssd sse ssi ssk ssl sso ssr sss ssv svd sve svi svk svl svo svr svs svv v-e vdd vde vdi vdk vdl vdo vdr vds vdv ved vee vei vek vel veo ver ves vi- vid vie vii vik vil vio vir vis viv vl- vld vle vlk vll vlo vls vlv vod voe voi vok vol voo vor vos vov vrd vre vri vrk vrr vrs vsd vse vsi vsk vsl vso vsr vss vsv vvi vvo vvr vvs vvv