-er eee eek eel eep eer ees eet eie eii eik eil eip eir eis eit eke eki ekl ekp ekr eks ekt ele eli elk ell elp elr els elt ep- epe epi epl epp epr eps ept ere eri erk erl erp err ers ert es- ese esi esk esl esp esr ess est ete eti etk etl etp etr ets ett ie- iee iei iek iel iep ier ies iet iie iii iil iip iir iis iit ike iki ikk ikl ikr iks ikt il- ile ili ilk ill ilp ilr ils ilt ipe ipi ipl ipp ipr ips ipt ir- ire iri irk irl irp irr irs irt is- ise isi isk isl isp isr iss ist ite iti itk itl itp its itt k-t ke- kee kei kek kel kep ker kes ket kie kii kik kil kip kir kis kit kke kki kkk kkl kkp kkr kks kkt kl- kli klr kls klt kpe kpi kpk kpl kpp kpr kps kpt kri krk krl krp krr krs krt kse ksi ksk ksl ksp ksr kss kst kte ktk ktl ktp ktr kts ktt l-p lee lei lek lel lep ler les let lie lii lik lil lip lir lis lit lkl lkp lkr lks lkt lle lli llk lll llp llr lls llt lpe lpi lpk lpl lpp lpr lps lpt lri lrk lrp lrr lrs lrt lse lsi lsk lsl lsp lsr lss lst lte lti ltk ltl ltp ltr lts ltt p-p pee pei pek pel pep per pes pet pie pii pik pil pip pir pis pit pke pki pkl pkp pkr pks pkt ple pli plk pll plp plr pls plt ppe ppi ppk ppl ppp ppr pps ppt pre pri prk prl prp prr prs prt ps- pse psi psk psl psp psr pss pst pt- pte pti ptk ptl ptp ptr pts ptt re- ree rei rek rel rep rer res ret rie rii rik ril rip rir ris rit rke rkk rkp rks rkt rle rli rll rlp rlr rls rlt rpe rpi rpk rpl rpp rpr rps rpt rri rrk rrl rrp rrr rrs rrt rse rsi rsk rsl rsp rsr rss rst rte rti rtk rtl rtp rtr rts rtt se- see sei sek sel sep ser ses set sie sii sik sil sip sir sis sit sk- ske ski skk skl skp skr sks skt sle sli slk sll slp slr sls slt spe spi spk spl spp spr sps spt sr- sre sri srk srl srp srr srs srt ss- sse ssi ssk ssl ssp ssr sss sst ste sti stk stl stp str sts stt te- tee tei tek tel tep ter tes tet tie tii tik til tip tir tis tit tke tkk tkl tkp tkr tks tkt tle tli tlk tll tlp tlr tls tlt tpe tpi tpk tpl tpp tpr tps tpt tre tri trk trl trp trr trs trt tse tsi tsk tsl tsp tsr tss tst tte tti ttk ttl ttp ttr tts ttt