-er eee eek een eep eer ees eet eie eii eik ein eip eir eis eit eke eki ekp ekr eks ekt en- ene eni enk enn enp enr ens ent ep- epe epi epn epp epr eps ept ere eri erk ern erp err ers ert es- ese esi esk esn esp esr ess est ete eti etk etn etp etr ets ett ie- iee iei iek ien iep ier ies iet iie iii iin iip iir iis iit ike iki ikk ikr iks ikt in- ine ini ink inn inp inr ins int ipe ipi ipn ipp ipr ips ipt ir- ire iri irk irn irp irr irs irt is- ise isi isk isn isp isr iss ist ite iti itk itn itp its itt k-t ke- kee kei kek ken kep ker kes ket kie kii kik kin kip kir kis kit kke kki kkk kkn kkp kkr kks kkt kn- kne kni knk knn knp knr knt kpe kpi kpk kpn kpp kpr kps kpt kri krk krn krp krr krs krt kse ksi ksk ksn ksp ksr kss kst kte ktk ktn ktp ktr kts ktt n-i ne- nee nei nek nen nep ner nes net nie nii nik nin nip nir nis nit nke nki nkk nkn nkp nkr nks nkt nne nni nnk nnn nnp nns nnt npe npi npn npp npr nps npt nre nri nrk nrn nrp nrr nrs nrt nse nsi nsk nsn nsp nsr nss nst nte nti ntk ntn ntp ntr nts ntt p-p pee pei pek pen pep per pes pet pie pii pik pin pip pir pis pit pke pki pkn pkp pkr pks pkt pn- pne pni pnk pnn pnp pnr pns pnt ppe ppi ppk ppn ppp ppr pps ppt pre pri prk prn prp prr prs prt ps- pse psi psk psn psp psr pss pst pt- pte pti ptk ptn ptp ptr pts ptt re- ree rei rek ren rep rer res ret rie rii rik rin rip rir ris rit rke rkk rkp rks rkt rni rnn rnp rnr rns rnt rpe rpi rpk rpn rpp rpr rps rpt rri rrk rrn rrp rrr rrs rrt rse rsi rsk rsn rsp rsr rss rst rte rti rtk rtn rtp rtr rts rtt se- see sei sek sen sep ser ses set sie sii sik sin sip sir sis sit sk- ske ski skk skp skr sks skt sne sni snk snn snp snr sns snt spe spi spk spn spp spr sps spt sr- sre sri srk srn srp srr srs srt ss- sse ssi ssk ssn ssp ssr sss sst ste sti stk stn stp str sts stt te- tee tei tek ten tep ter tes tet tie tii tik tin tip tir tis tit tke tkk tkp tkr tks tkt tne tni tnk tnn tnp tnr tns tnt tpe tpi tpk tpn tpp tpr tps tpt tre tri trk trn trp trr trs trt tse tsi tsk tsn tsp tsr tss tst tte tti ttk ttn ttp ttr tts ttt