-ey eee een eeo eet eex eey en- ene enn eno ent eny eo- eoe eon eoo eot ete etn eto ett etx ety ex- exe exo ext exx exy eye eyn eyo eyt ne- nee nen neo net nex ney nne nnn nno nnt no- noe non noo not nox noy nte ntn nto ntt ntx nxt nye nyn nyo nyt nyx nyy oee oen oeo oet oex oey on- one onn ono ont onx ony oo- oon ooo oot oox ot- ote otn oto ott ox- oxn oxo oxt oxx oxy oye oyo t-x te- tee ten teo tet tex tey tne tnn tno tnt tnx to- toe ton too tot tox toy tte ttn tto ttt ttx tty txe txn txt tye tyn tyo tyt xee xen xet xex xno xon xoo xot xox xtx xty xxo xxx xxy xyy yee yen yeo yet yex yey yne ynn yny yoe yon yoo yot yox yoy yte ytn yto ytt yxe yxy yye yyt yyy