-er -ey a-a a-b aaa aab aae aag aao aar aau aay ab- aba abb abe abg abo abr abu aby aea aeb aee aeg aeo aer aeu aey ag- aga agb age agg ago agr agu agy aoa aob aoe aog aoo aor aou ar- ara arb are arg aro arr aru ary au- aua aub aue aug auo aur ay- aya aye ayo ayr ayu b-u baa bab bae bag bao bar bau bay bba bbb bbe bbg bbo bbr bbu bby be- bea beb bee beg beo ber beu bey bga bgb bge bgg bgo bgr bgu boa bob boe bog boo bor bou boy bra brb bre brg bro brr bru bry bua bub bue bug buo bur buu buy by- bya bye byg byo byr byu eaa eab eae eag eao ear eau eba ebb ebe ebg ebo ebr ebu eby eea eeb eee eeg eeo eer eey ega egb ege egg ego egr egu egy eo- eoa eob eoe eog eoo eor eou era erb ere erg ero err eru ery eu- eua eub eue eug eur eya eye eyo eyr gaa gab gae gag gao gar gau gay gba gbe gbg gbo gbr gbu gby ge- gea geb gee geg geo ger geu gey gga ggb ggg ggo ggr ggu goa gob goe gog goo gor gou goy gra grb gre grg gro grr gru gry gu- gua gub gue gug guo gur guu guy gy- gya gyb gye gyo gyr oaa oab oae oag oao oar oau ob- oba obb obe obg obo obr obu oby oea oeb oee oeg oeo oer oey oga oge ogg ogo ogy oo- ooa oob oog ooo oor or- ora orb ore org oro orr oru ory ou- oua oue ouo our oya oye oyo ra- raa rab rae rag rao rar rau ray rba rbb rbe rbg rbo rbr rbu re- rea reb ree reg reo rer reu rey rga rgb rge rgg rgo rgr roa rob roe rog roo ror rou roy rra rrb rrg rrr rru rua rub rue rug ruo rur ruu ruy ry- rya rye ryg ryo ryr ryu ryy ua- uaa uab uae uag uao uar uau uay uba ubb ube ubg ubo ubr ubu uby uea ueb uee ueg uer uey uga ugb uge ugg ugo ugr ugu uoa uob uoe uog uoo uor ur- ura urb ure urg uro urr uru ury uua uue uug uur uuu uyo uyu yaa yab yae yag yao yar yau yay ybe ybg ybr yby yea yeb yee yeg yeo yer yey yga ygo yob yoe yog yoo yor you yoy yra yre yrg yro yru yua yue yug yuo yur yuu yuy yyb yye yyg yyu yyy