-ey a-a a-b aaa aab aae aag aas aay ab- aba abb abe abg abs aby aea aeb aee aeg aes aey ag- aga agb age agg ags agy as- asa asb ase asg ass asy ay- aya aye ays baa bab bae bag bas bay bba bbb bbe bbg bbs bby be- bea beb bee beg bes bey bga bgb bge bgg bgs bsa bsb bse bsg bss bsy by- bya bye byg bys eaa eab eae eag eas eba ebb ebe ebg ebs eby eea eeb eee eeg ees eey ega egb ege egg egs egy es- esa esb ese esg ess esy eya eye eys gaa gab gae gag gas gay gba gbe gbg gbs gby ge- gea geb gee geg ges gey gga ggb ggg ggs gsa gsb gse gsg gss gy- gya gyb gye gys saa sab sae sag sas say sba sbb sbe sbg sbs sby se- sea seb see seg ses sey sga sgb sge sgg sgs ss- ssa ssb sse ssg sss sy- sya syb sye syg sys yaa yab yae yag yas yay ybe ybg ybs yby yea yeb yee yeg yes yey yga ysa ysb yse ysg yss ysy yyb yye yyg yys yyy