-ey eee een eeo eep eet eex eey en- ene enn eno enp ent eny eo- eoe eon eoo eop eot ep- epe epn epo epp ept epx ete etn eto etp ett etx ety ex- exe exo exp ext exx exy eye eyn eyo eyp eyt ne- nee nen neo nep net nex ney nne nnn nno nnp nnt no- noe non noo nop not nox noy npe npn npo npp npt nte ntn nto ntp ntt ntx nxt nye nyn nyo nyp nyt nyx nyy oee oen oeo oep oet oex oey on- one onn ono onp ont onx ony oo- oon ooo oop oot oox op- ope opn opo opp opt opx opy ot- ote otn oto otp ott ox- oxn oxo oxt oxx oxy oye oyo p-p pee pen peo pep pet pex pey pn- pne pnn pno pnp pnt pnx pny poe pon poo pop pot pox poy ppe ppn ppo ppp ppt ppx pt- pte ptn pto ptp ptt ptx pty pxe pxt py- pye pyn pyo pyt pyx t-x te- tee ten teo tep tet tex tey tne tnn tno tnp tnt tnx to- toe ton too top tot tox toy tpe tpn tpo tpp tpt tpx tte ttn tto ttp ttt ttx tty txe txn txt tye tyn tyo typ tyt xee xen xep xet xex xno xon xoo xop xot xox xpe xpn xpo xpp xpt xtp xtx xty xxo xxp xxx xxy xyp xyy yee yen yeo yep yet yex yey yne ynn ynp yny yoe yon yoo yop yot yox yoy ypo yte ytn yto ytp ytt yxe yxy yye yyt yyy