eee eem eeo eep eet em- eme emm emo emp emt eo- eoe eom eoo eop eot ep- epe epm epo epp ept ete etm eto etp ett m-o mee mem meo mep met mme mmm mmo mmp mmt moe mom moo mop mot mpe mpm mpo mpp mpt mte mtm mto mtp mtt oee oem oeo oep oet om- ome omm omo omp omt oo- oom ooo oop oot op- ope opm opo opp opt ot- ote otm oto otp ott p-p pee pem peo pep pet pme pmm pmo pmp pmt poe pom poo pop pot ppe ppm ppo ppp ppt pt- pte ptm pto ptp ptt te- tee tem teo tep tet tme tmm tmo tmp tmt to- toe tom too top tot tpe tpm tpo tpp tpt tte ttm tto ttp ttt