-ey a-a a-b aaa aab aae aag aao aas aay ab- aba abb abe abg abo abs aby aea aeb aee aeg aeo aes aey ag- aga agb age agg ago ags agy aoa aob aoe aog aoo aos as- asa asb ase asg aso ass asy ay- aya aye ayo ays baa bab bae bag bao bas bay bba bbb bbe bbg bbo bbs bby be- bea beb bee beg beo bes bey bga bgb bge bgg bgo bgs boa bob boe bog boo bos boy bsa bsb bse bsg bso bss bsy by- bya bye byg byo bys eaa eab eae eag eao eas eba ebb ebe ebg ebo ebs eby eea eeb eee eeg eeo ees eey ega egb ege egg ego egs egy eo- eoa eob eoe eog eoo eos es- esa esb ese esg eso ess esy eya eye eyo eys gaa gab gae gag gao gas gay gba gbe gbg gbo gbs gby ge- gea geb gee geg geo ges gey gga ggb ggg ggo ggs goa gob goe gog goo gos goy gsa gsb gse gsg gso gss gy- gya gyb gye gyo gys oaa oab oae oag oao oas ob- oba obb obe obg obo obs oby oea oeb oee oeg oeo oes oey oga oge ogg ogo ogs ogy oo- ooa oob oog ooo oos os- osa osb ose osg oso oss oya oye oyo oys saa sab sae sag sao sas say sba sbb sbe sbg sbo sbs sby se- sea seb see seg seo ses sey sga sgb sge sgg sgo sgs soa sob soe sog soo sos soy ss- ssa ssb sse ssg sso sss sy- sya syb sye syg sys yaa yab yae yag yao yas yay ybe ybg ybs yby yea yeb yee yeg yeo yes yey yga ygo yob yoe yog yoo yos yoy ysa ysb yse ysg yso yss ysy yyb yye yyg yys yyy