-er -ey a-a a-b aaa aab aae aak aan aao aar aay ab- aba abb abe abk abn abo abr aby aea aeb aee aek aen aeo aer aey aka akb ake akk akn ako akr an- ana anb ane ank ann ano anr any aoa aob aoe aok aon aoo aor ar- ara arb are ark arn aro arr ary ay- aya aye ayk ayn ayo ayr baa bab bae bak ban bao bar bay bba bbb bbe bbk bbn bbo bbr bby be- bea beb bee bek ben beo ber bey bka bkb bke bkk bkn bko bkr bna bnb bne bnk bnn bno bnr boa bob boe bok bon boo bor boy bra brb bre brk brn bro brr bry by- bya bye byk byn byo byr eaa eab eae eak ean eao ear eba ebb ebe ebk ebn ebo ebr eby eea eeb eee eek een eeo eer eey eka ekb eke eko ekr eky en- ena enb ene enk enn eno enr eny eo- eoa eob eoe eok eon eoo eor era erb ere erk ern ero err ery eya eye eyn eyo eyr ka- kaa kab kae kak kan kao kar kay kba kbb kbe kbk kbn kbo kbr ke- kea keb kee kek ken keo ker key kkb kke kkk kkn kkr kky kn- kna kne knk knn kno knr koa kob koe kok kon koo kor koy kra krk krn kro krr kry kya kye kyn kyo kyr naa nab nae nak nan nao nar nay nba nbb nbe nbk nbn nbo nbr ne- nea neb nee nek nen neo ner ney nka nke nkk nkn nko nkr nky nna nnb nne nnk nnn nno no- noa nob noe nok non noo nor noy nra nrb nre nrk nrn nro nrr nry nya nye nyk nyn nyo nyy oaa oab oae oak oan oao oar ob- oba obb obe obk obn obo obr oby oea oeb oee oen oeo oer oey oka okb oke okk oko okr on- ona onb one onk onn ono onr ony oo- ooa oob ook oon ooo oor or- ora orb ore ork orn oro orr ory oya oye oyo ra- raa rab rae rak ran rao rar ray rba rbb rbe rbk rbn rbo rbr re- rea reb ree rek ren reo rer rey rkb rke rkk rko rky rna rnb rnn rno rnr rny roa rob roe rok ron roo ror roy rra rrb rrk rrn rrr ry- rya rye ryk ryn ryo ryr ryy yaa yab yae yak yan yao yar yay ybe ybr yby yea yeb yee yek yen yeo yer yey yka ykk ykn yna yne ynk ynn yny yob yoe yok yon yoo yor yoy yra yre yrn yro yyb yye yyy