-er -ey a-a a-b aaa aab aae aan aao aar aas aay ab- aba abb abe abn abo abr abs aby aea aeb aee aen aeo aer aes aey an- ana anb ane ann ano anr ans any aoa aob aoe aon aoo aor aos ar- ara arb are arn aro arr ars ary as- asa asb ase asn aso asr ass asy ay- aya aye ayn ayo ayr ays baa bab bae ban bao bar bas bay bba bbb bbe bbn bbo bbr bbs bby be- bea beb bee ben beo ber bes bey bna bnb bne bnn bno bnr bns boa bob boe bon boo bor bos boy bra brb bre brn bro brr brs bry bsa bsb bse bsn bso bsr bss bsy by- bya bye byn byo byr bys eaa eab eae ean eao ear eas eba ebb ebe ebn ebo ebr ebs eby eea eeb eee een eeo eer ees eey en- ena enb ene enn eno enr ens eny eo- eoa eob eoe eon eoo eor eos era erb ere ern ero err ers ery es- esa esb ese esn eso esr ess esy eya eye eyn eyo eyr eys naa nab nae nan nao nar nas nay nba nbb nbe nbn nbo nbr nbs ne- nea neb nee nen neo ner nes ney nna nnb nne nnn nno nns no- noa nob noe non noo nor nos noy nra nrb nre nrn nro nrr nrs nry nsa nsb nse nsn nso nsr nss nsy nya nye nyn nyo nys nyy oaa oab oae oan oao oar oas ob- oba obb obe obn obo obr obs oby oea oeb oee oen oeo oer oes oey on- ona onb one onn ono onr ons ony oo- ooa oob oon ooo oor oos or- ora orb ore orn oro orr ors ory os- osa osb ose osn oso osr oss oya oye oyo oys ra- raa rab rae ran rao rar ras ray rba rbb rbe rbn rbo rbr rbs re- rea reb ree ren reo rer res rey rna rnb rnn rno rnr rns rny roa rob roe ron roo ror ros roy rra rrb rrn rrr rrs rsa rsb rse rsn rso rsr rss ry- rya rye ryn ryo ryr rys ryy saa sab sae san sao sar sas say sba sbb sbe sbn sbo sbr sbs sby se- sea seb see sen seo ser ses sey sna snb sne snn sno snr sns sny soa sob soe son soo sor sos soy sr- sra srb sre srn sro srr srs sry ss- ssa ssb sse ssn sso ssr sss sy- sya syb sye syn syr sys yaa yab yae yan yao yar yas yay ybe ybr ybs yby yea yeb yee yen yeo yer yes yey yna yne ynn yns yny yob yoe yon yoo yor yos yoy yra yre yrn yro yrs ysa ysb yse yso ysr yss ysy yyb yye yys yyy