-ey eee een eep ees eet eex eey en- ene enn enp ens ent eny ep- epe epn epp eps ept epx es- ese esn esp ess est esx esy ete etn etp ets ett etx ety ex- exe exp exs ext exx exy eye eyn eyp eys eyt ne- nee nen nep nes net nex ney nne nnn nnp nns nnt npe npn npp nps npt nse nsn nsp nss nst nsx nsy nte ntn ntp nts ntt ntx nxt nye nyn nyp nys nyt nyx nyy p-p pee pen pep pes pet pex pey pn- pne pnn pnp pns pnt pnx pny ppe ppn ppp pps ppt ppx ps- pse psn psp pss pst psx psy pt- pte ptn ptp pts ptt ptx pty pxe pxs pxt py- pye pyn pys pyt pyx se- see sen sep ses set sex sey sne snn snp sns snt sny spe spn spp sps spt spx spy ss- sse ssn ssp sss sst ssx ste stn stp sts stt stx sty sxn sxs sxt sy- sye syn syp sys syt syx t-x te- tee ten tep tes tet tex tey tne tnn tnp tns tnt tnx tpe tpn tpp tps tpt tpx tse tsn tsp tss tst tsx tsy tte ttn ttp tts ttt ttx tty txe txn txs txt tye tyn typ tys tyt xee xen xep xes xet xex xns xpe xpn xpp xps xpt xsp xss xst xtp xts xtx xty xxp xxx xxy xyp xyy yee yen yep yes yet yex yey yne ynn ynp yns yny yps yse ysp yss yst ysy yte ytn ytp yts ytt yxe yxy yye yys yyt yyy