eee eek eeo eep ees eet eie eii eik eio eip eis eit eke eki eko ekp eks ekt eo- eoe eoi eok eoo eop eos eot ep- epe epi epo epp eps ept es- ese esi esk eso esp ess est ete eti etk eto etp ets ett ie- iee iei iek iep ies iet iie iii iio iip iis iit ike iki ikk iko iks ikt io- ioe ioi ioo iop ios iot ipe ipi ipo ipp ips ipt is- ise isi isk iso isp iss ist ite iti itk ito itp its itt k-t ke- kee kei kek keo kep kes ket kie kii kik kio kip kis kit kke kki kkk kkp kks kkt koe koi kok koo kop kos kot kpe kpi kpk kpo kpp kps kpt kse ksi ksk kso ksp kss kst kte ktk kto ktp kts ktt o-i oee oei oeo oep oes oet oie oii oik oio oip ois oit oke oki okk oko okp oks oo- ooi ook ooo oop oos oot op- ope opi opk opo opp ops opt os- ose osi osk oso osp oss ost ot- ote oti otk oto otp ots ott p-p pee pei pek peo pep pes pet pie pii pik pio pip pis pit pke pki pko pkp pks pkt poe poi pok poo pop pos pot ppe ppi ppk ppo ppp pps ppt ps- pse psi psk pso psp pss pst pt- pte pti ptk pto ptp pts ptt se- see sei sek seo sep ses set sie sii sik sio sip sis sit sk- ske ski skk sko skp sks skt soe soi sok soo sop sos sot spe spi spk spo spp sps spt ss- sse ssi ssk sso ssp sss sst ste sti stk sto stp sts stt te- tee tei tek teo tep tes tet tie tii tik tio tip tis tit tke tkk tko tkp tks tkt to- toe toi tok too top tos tot tpe tpi tpk tpo tpp tps tpt tse tsi tsk tso tsp tss tst tte tti ttk tto ttp tts ttt