-er -ol ddd dde ddk ddl ddo ddr dds ddt de- ded dee dek del deo der des det dke dkk dkl dko dkr dks dkt dl- dld dle dlk dll dlo dlr dls dlt dod doe dok dol doo dor dos dot drd dre drk drl dro drr drs drt dsd dse dsk dsl dso dsr dss dst dtd dte dtk dtl dto dtr dts dtt ed- edd ede edk edl edo edr eds edt eed eee eek eel eeo eer ees eet ekd eke ekl eko ekr eks ekt eld ele elk ell elo elr els elt eo- eod eoe eok eol eoo eor eos eot erd ere erk erl ero err ers ert es- esd ese esk esl eso esr ess est etd ete etk etl eto etr ets ett k-t kde kdk kdl kdo kdr kds kdt ke- ked kee kek kel keo ker kes ket kke kkk kkl kkr kks kkt kl- kld klo klr kls klt kod koe kok kol koo kor kos kot krd krk krl kro krr krs krt ksd kse ksk ksl kso ksr kss kst kte ktk ktl kto ktr kts ktt ldd lde ldk ldl ldo ldr lds ldt led lee lek lel leo ler les let lkl lkr lks lkt lld lle llk lll llo llr lls llt lod loe lok lol loo lor los lot lrd lrk lro lrr lrs lrt lsd lse lsk lsl lso lsr lss lst ltd lte ltk ltl lto ltr lts ltt odd ode odl odo odr ods odt oed oee oel oeo oer oes oet okd oke okk okl oko okr oks old ole olk oll olo ols olt oo- ood ook ool ooo oor oos oot or- ord ore ork orl oro orr ors ort os- osd ose osk osl oso osr oss ost ot- otd ote otk otl oto otr ots ott rdd rde rdl rdo rdr rds rdt re- red ree rek rel reo rer res ret rke rkk rko rks rkt rld rle rll rlo rlr rls rlt rod roe rok rol roo ror ros rot rrd rrk rrl rrr rrs rrt rsd rse rsk rsl rso rsr rss rst rtd rte rtk rtl rto rtr rts rtt sdd sde sdk sdl sdo sdr sds sdt se- sed see sek sel seo ser ses set sk- skd ske skk skl sko skr sks skt sld sle slk sll slo slr sls slt sod soe sok sol soo sor sos sot sr- srd sre srk srl sro srr srs srt ss- ssd sse ssk ssl sso ssr sss sst std ste stk stl sto str sts stt tdd tde tdk tdl tdo tdr tds tdt te- ted tee tek tel teo ter tes tet tke tkk tkl tko tkr tks tkt tld tle tlk tll tlo tlr tls tlt to- tod toe tok tol too tor tos tot trd tre trk trl tro trr trs trt tsd tse tsk tsl tso tsr tss tst ttd tte ttk ttl tto ttr tts ttt