-er -ey a-a aaa aae aan aao aar aax aay aea aee aen aeo aer aex aey an- ana ane ann ano anr anx any aoa aoe aon aoo aor aox ar- ara are arn aro arr arx ary ax- axa axe axn axo axr axx ay- aya aye ayn ayo ayr ayx eaa eae ean eao ear eax eea eee een eeo eer eex eey en- ena ene enn eno enr eny eo- eoa eoe eon eoo eor era ere ern ero err ery ex- exa exe exo exr exx exy eya eye eyn eyo eyr naa nae nan nao nar nax nay ne- nea nee nen neo ner nex ney nna nne nnn nno no- noa noe non noo nor nox noy nra nre nrn nro nrr nrx nry nya nye nyn nyo nyx nyy oaa oae oan oao oar oax oea oee oen oeo oer oex oey on- ona one onn ono onr onx ony oo- ooa oon ooo oor oox or- ora ore orn oro orr orx ory ox- oxa oxn oxo oxx oxy oya oye oyo ra- raa rae ran rao rar rax ray re- rea ree ren reo rer rex rey rna rnn rno rnr rny roa roe ron roo ror rox roy rra rrn rrr rxr ry- rya rye ryn ryo ryr ryy xaa xan xar xee xen xer xex xna xno xoa xon xoo xor xox xrx xry xxo xxx xxy xyr xyy yaa yae yan yao yar yax yay yea yee yen yeo yer yex yey yna yne ynn yny yoe yon yoo yor yox yoy yra yre yrn yro yxa yxe yxy yye yyy