-er ddd dde ddi ddk ddl ddr dds ddt de- ded dee dei dek del der des det di- did die dii dik dil dir dis dit dke dki dkk dkl dkr dks dkt dl- dld dle dli dlk dll dlr dls dlt drd dre dri drk drl drr drs drt dsd dse dsi dsk dsl dsr dss dst dtd dte dti dtk dtl dtr dts dtt ed- edd ede edi edk edl edr eds edt eed eee eek eel eer ees eet eid eie eii eik eil eir eis eit ekd eke eki ekl ekr eks ekt eld ele eli elk ell elr els elt erd ere eri erk erl err ers ert es- esd ese esi esk esl esr ess est etd ete eti etk etl etr ets ett i-d idd ide idi idk idl idr ids idt ie- ied iee iei iek iel ier ies iet iid iie iii iil iir iis iit ike iki ikk ikl ikr iks ikt il- ild ile ili ilk ill ilr ils ilt ir- ird ire iri irk irl irr irs irt is- isd ise isi isk isl isr iss ist itd ite iti itk itl its itt k-t kde kdk kdl kdr kds kdt ke- ked kee kei kek kel ker kes ket kid kie kii kik kil kir kis kit kke kki kkk kkl kkr kks kkt kl- kld kli klr kls klt krd kri krk krl krr krs krt ksd kse ksi ksk ksl ksr kss kst kte ktk ktl ktr kts ktt ldd lde ldi ldk ldl ldr lds ldt led lee lei lek lel ler les let lid lie lii lik lil lir lis lit lkl lkr lks lkt lld lle lli llk lll llr lls llt lrd lri lrk lrr lrs lrt lsd lse lsi lsk lsl lsr lss lst ltd lte lti ltk ltl ltr lts ltt rdd rde rdi rdl rdr rds rdt re- red ree rei rek rel rer res ret rid rie rii rik ril rir ris rit rke rkk rks rkt rld rle rli rll rlr rls rlt rrd rri rrk rrl rrr rrs rrt rsd rse rsi rsk rsl rsr rss rst rtd rte rti rtk rtl rtr rts rtt sdd sde sdi sdk sdl sdr sds sdt se- sed see sei sek sel ser ses set sid sie sii sik sil sir sis sit sk- skd ske ski skk skl skr sks skt sld sle sli slk sll slr sls slt sr- srd sre sri srk srl srr srs srt ss- ssd sse ssi ssk ssl ssr sss sst std ste sti stk stl str sts stt tdd tde tdi tdk tdl tdr tds tdt te- ted tee tei tek tel ter tes tet tid tie tii tik til tir tis tit tke tkk tkl tkr tks tkt tld tle tli tlk tll tlr tls tlt trd tre tri trk trl trr trs trt tsd tse tsi tsk tsl tsr tss tst ttd tte tti ttk ttl ttr tts ttt