-er -ey a-a a-b aaa aab aae aak aar aas aay ab- aba abb abe abk abr abs aby aea aeb aee aek aer aes aey aka akb ake akk akr aks ar- ara arb are ark arr ars ary as- asa asb ase ask asr ass asy ay- aya aye ayk ayr ays baa bab bae bak bar bas bay bba bbb bbe bbk bbr bbs bby be- bea beb bee bek ber bes bey bka bkb bke bkk bkr bks bra brb bre brk brr brs bry bsa bsb bse bsk bsr bss bsy by- bya bye byk byr bys eaa eab eae eak ear eas eba ebb ebe ebk ebr ebs eby eea eeb eee eek eer ees eey eka ekb eke ekr eks eky era erb ere erk err ers ery es- esa esb ese esk esr ess esy eya eye eyr eys ka- kaa kab kae kak kar kas kay kba kbb kbe kbk kbr kbs ke- kea keb kee kek ker kes key kkb kke kkk kkr kks kky kra krk krr krs kry ksa ksb kse ksk ksr kss kya kye kyr kys ra- raa rab rae rak rar ras ray rba rbb rbe rbk rbr rbs re- rea reb ree rek rer res rey rkb rke rkk rks rky rra rrb rrk rrr rrs rsa rsb rse rsk rsr rss ry- rya rye ryk ryr rys ryy saa sab sae sak sar sas say sba sbb sbe sbk sbr sbs sby se- sea seb see sek ser ses sey sk- ska skb ske skk skr sks sky sr- sra srb sre srk srr srs sry ss- ssa ssb sse ssk ssr sss sy- sya syb sye syk syr sys yaa yab yae yak yar yas yay ybe ybr ybs yby yea yeb yee yek yer yes yey yka ykk yra yre yrs ysa ysb yse ysk ysr yss ysy yyb yye yys yyy