-er -ey a-a a-b aaa aab aae aag aar aas aau aay ab- aba abb abe abg abr abs abu aby aea aeb aee aeg aer aes aeu aey ag- aga agb age agg agr ags agu agy ar- ara arb are arg arr ars aru ary as- asa asb ase asg asr ass asu asy au- aua aub aue aug aur aus ay- aya aye ayr ays ayu b-u baa bab bae bag bar bas bau bay bba bbb bbe bbg bbr bbs bbu bby be- bea beb bee beg ber bes beu bey bga bgb bge bgg bgr bgs bgu bra brb bre brg brr brs bru bry bsa bsb bse bsg bsr bss bsu bsy bua bub bue bug bur bus buu buy by- bya bye byg byr bys byu eaa eab eae eag ear eas eau eba ebb ebe ebg ebr ebs ebu eby eea eeb eee eeg eer ees eey ega egb ege egg egr egs egu egy era erb ere erg err ers eru ery es- esa esb ese esg esr ess esu esy eu- eua eub eue eug eur eus eya eye eyr eys gaa gab gae gag gar gas gau gay gba gbe gbg gbr gbs gbu gby ge- gea geb gee geg ger ges geu gey gga ggb ggg ggr ggs ggu gra grb gre grg grr grs gru gry gsa gsb gse gsg gsr gss gsu gu- gua gub gue gug gur gus guu guy gy- gya gyb gye gyr gys ra- raa rab rae rag rar ras rau ray rba rbb rbe rbg rbr rbs rbu re- rea reb ree reg rer res reu rey rga rgb rge rgg rgr rgs rra rrb rrg rrr rrs rru rsa rsb rse rsg rsr rss rsu rua rub rue rug rur rus ruu ruy ry- rya rye ryg ryr rys ryu ryy saa sab sae sag sar sas sau say sba sbb sbe sbg sbr sbs sbu sby se- sea seb see seg ser ses seu sey sga sgb sge sgg sgr sgs sgu sr- sra srb sre srg srr srs sry ss- ssa ssb sse ssg ssr sss ssu sua sub sue sug sur sus suu suy sy- sya syb sye syg syr sys syu ua- uaa uab uae uag uar uas uau uay uba ubb ube ubg ubr ubs ubu uby uea ueb uee ueg uer ues uey uga ugb uge ugg ugr ugs ugu ur- ura urb ure urg urr urs uru ury usa usb use usg usr uss usu uua uue uug uur uus uuu uys uyu yaa yab yae yag yar yas yau yay ybe ybg ybr ybs yby yea yeb yee yeg yer yes yey yga yra yre yrg yrs yru ysa ysb yse ysg ysr yss ysu ysy yua yue yug yur yus yuu yuy yyb yye yyg yys yyu yyy