-er -ey a-a a-b aaa aab aae aak aan aao aar aas aay ab- aba abb abe abk abn abo abr abs aby aea aeb aee aek aen aeo aer aes aey aka akb ake akk akn ako akr aks an- ana anb ane ank ann ano anr ans any aoa aob aoe aok aon aoo aor aos ar- ara arb are ark arn aro arr ars ary as- asa asb ase ask asn aso asr ass asy ay- aya aye ayk ayn ayo ayr ays baa bab bae bak ban bao bar bas bay bba bbb bbe bbk bbn bbo bbr bbs bby be- bea beb bee bek ben beo ber bes bey bka bkb bke bkk bkn bko bkr bks bna bnb bne bnk bnn bno bnr bns boa bob boe bok bon boo bor bos boy bra brb bre brk brn bro brr brs bry bsa bsb bse bsk bsn bso bsr bss bsy by- bya bye byk byn byo byr bys eaa eab eae eak ean eao ear eas eba ebb ebe ebk ebn ebo ebr ebs eby eea eeb eee eek een eeo eer ees eey eka ekb eke eko ekr eks eky en- ena enb ene enk enn eno enr ens eny eo- eoa eob eoe eok eon eoo eor eos era erb ere erk ern ero err ers ery es- esa esb ese esk esn eso esr ess esy eya eye eyn eyo eyr eys ka- kaa kab kae kak kan kao kar kas kay kba kbb kbe kbk kbn kbo kbr kbs ke- kea keb kee kek ken keo ker kes key kkb kke kkk kkn kkr kks kky kn- kna kne knk knn kno knr koa kob koe kok kon koo kor kos koy kra krk krn kro krr krs kry ksa ksb kse ksk ksn kso ksr kss kya kye kyn kyo kyr kys naa nab nae nak nan nao nar nas nay nba nbb nbe nbk nbn nbo nbr nbs ne- nea neb nee nek nen neo ner nes ney nka nke nkk nkn nko nkr nks nky nna nnb nne nnk nnn nno nns no- noa nob noe nok non noo nor nos noy nra nrb nre nrk nrn nro nrr nrs nry nsa nsb nse nsk nsn nso nsr nss nsy nya nye nyk nyn nyo nys nyy oaa oab oae oak oan oao oar oas ob- oba obb obe obk obn obo obr obs oby oea oeb oee oen oeo oer oes oey oka okb oke okk oko okr oks on- ona onb one onk onn ono onr ons ony oo- ooa oob ook oon ooo oor oos or- ora orb ore ork orn oro orr ors ory os- osa osb ose osk osn oso osr oss oya oye oyo oys ra- raa rab rae rak ran rao rar ras ray rba rbb rbe rbk rbn rbo rbr rbs re- rea reb ree rek ren reo rer res rey rkb rke rkk rko rks rky rna rnb rnn rno rnr rns rny roa rob roe rok ron roo ror ros roy rra rrb rrk rrn rrr rrs rsa rsb rse rsk rsn rso rsr rss ry- rya rye ryk ryn ryo ryr rys ryy saa sab sae sak san sao sar sas say sba sbb sbe sbk sbn sbo sbr sbs sby se- sea seb see sek sen seo ser ses sey sk- ska skb ske skk sko skr sks sky sna snb sne snk snn sno snr sns sny soa sob soe sok son soo sor sos soy sr- sra srb sre srk srn sro srr srs sry ss- ssa ssb sse ssk ssn sso ssr sss sy- sya syb sye syk syn syr sys yaa yab yae yak yan yao yar yas yay ybe ybr ybs yby yea yeb yee yek yen yeo yer yes yey yka ykk ykn yna yne ynk ynn yns yny yob yoe yok yon yoo yor yos yoy yra yre yrn yro yrs ysa ysb yse ysk yso ysr yss ysy yyb yye yys yyy