-er -ey a-a a-b aaa aab aae aaf aak aan aar aay ab- aba abb abe abf abk abn abr aby aea aeb aee aef aek aen aer aey af- afa afb afe aff afk afn afr afy aka akb ake akk akn akr an- ana anb ane anf ank ann anr any ar- ara arb are arf ark arn arr ary ay- aya aye ayf ayk ayn ayr baa bab bae baf bak ban bar bay bba bbb bbe bbf bbk bbn bbr bby be- bea beb bee bef bek ben ber bey bfa bfb bfe bff bfn bfr bfy bka bkb bke bkf bkk bkn bkr bna bnb bne bnf bnk bnn bnr bra brb bre brf brk brn brr bry by- bya bye byf byk byn byr eaa eab eae eaf eak ean ear eba ebb ebe ebf ebk ebn ebr eby eea eeb eee eef eek een eer eey ef- efa efb efe eff efr eka ekb eke ekf ekr eky en- ena enb ene enf enk enn enr eny era erb ere erf erk ern err ery eya eye eyn eyr faa fab fae faf fak fan far fay fba fbb fbe fbf fbk fbn fbr fea feb fee fef fek fen fer fey ffa ffe fff ffk ffn ffr ffy fka fkb fkf fkk fna fnb fne fnf fnk fnn fnr fra frb fre frf frk frn frr fry fy- fya fyb fye fyk fyn ka- kaa kab kae kaf kak kan kar kay kba kbb kbe kbf kbk kbn kbr ke- kea keb kee kef kek ken ker key kfa kff kkb kke kkk kkn kkr kky kn- kna kne knf knk knn knr kra krf krk krn krr kry kya kye kyn kyr naa nab nae naf nak nan nar nay nba nbb nbe nbf nbk nbn nbr ne- nea neb nee nef nek nen ner ney nfa nfb nfe nff nfk nfn nfr nka nke nkf nkk nkn nkr nky nna nnb nne nnf nnk nnn nra nrb nre nrf nrk nrn nrr nry nya nye nyf nyk nyn nyy ra- raa rab rae raf rak ran rar ray rba rbb rbe rbf rbk rbn rbr re- rea reb ree ref rek ren rer rey rfa rfb rfe rff rfk rfn rfr rkb rke rkf rkk rky rna rnb rnn rnr rny rra rrb rrf rrk rrn rrr ry- rya rye ryf ryk ryn ryr ryy yaa yab yae yaf yak yan yar yay ybe ybf ybr yby yea yeb yee yef yek yen yer yey yfa yfe yff yfr yka ykk ykn yna yne ynk ynn yny yra yre yrf yrn yyb yye yyf yyy