a-a a-b aaa aab aad aag aas aay ab- aba abb abd abg abs aby ad- ada adb add adg ads ady ag- aga agb agd agg ags agy as- asa asb asd asg ass asy ay- aya ayd ays baa bab bad bag bas bay bba bbb bbd bbg bbs bby bda bdb bdd bdg bds bdy bga bgb bgd bgg bgs bsa bsb bsd bsg bss bsy by- bya byd byg bys daa dab dad dag das day dba dbb dbd dbg dbs dby dda ddb ddd ddg dds ddy dga dgd dgg dgs dsa dsb dsd dsg dss dsy dy- dya dyb dyd dys dyy g-d gaa gab gad gag gas gay gba gbd gbg gbs gby gda gdb gdd gds gga ggb ggd ggg ggs gsa gsb gsd gsg gss gy- gya gyb gyd gys saa sab sad sag sas say sba sbb sbd sbg sbs sby sda sdb sdd sdg sds sdy sga sgb sgd sgg sgs ss- ssa ssb ssd ssg sss sy- sya syb syd syg sys yaa yab yad yag yas yay ybg ybs yby yda ydg yds ydy yga ysa ysb ysg yss ysy yyb yyg yys yyy