eee eek eeo eep ees eet eke eko ekp eks ekt eo- eoe eok eoo eop eos eot ep- epe epo epp eps ept es- ese esk eso esp ess est ete etk eto etp ets ett k-t ke- kee kek keo kep kes ket kke kkk kkp kks kkt koe kok koo kop kos kot kpe kpk kpo kpp kps kpt kse ksk kso ksp kss kst kte ktk kto ktp kts ktt oee oeo oep oes oet oke okk oko okp oks oo- ook ooo oop oos oot op- ope opk opo opp ops opt os- ose osk oso osp oss ost ot- ote otk oto otp ots ott p-p pee pek peo pep pes pet pke pko pkp pks pkt poe pok poo pop pos pot ppe ppk ppo ppp pps ppt ps- pse psk pso psp pss pst pt- pte ptk pto ptp pts ptt se- see sek seo sep ses set sk- ske skk sko skp sks skt soe sok soo sop sos sot spe spk spo spp sps spt ss- sse ssk sso ssp sss sst ste stk sto stp sts stt te- tee tek teo tep tes tet tke tkk tko tkp tks tkt to- toe tok too top tos tot tpe tpk tpo tpp tps tpt tse tsk tso tsp tss tst tte ttk tto ttp tts ttt