-er -ey a-a a-b aaa aab aad aae aao aar aau aay ab- aba abb abd abe abo abr abu aby ad- ada adb add ade ado adr adu ady aea aeb aed aee aeo aer aeu aey aoa aob aod aoe aoo aor aou ar- ara arb ard are aro arr aru ary au- aua aub aud aue auo aur ay- aya ayd aye ayo ayr ayu b-u baa bab bad bae bao bar bau bay bba bbb bbd bbe bbo bbr bbu bby bda bdb bdd bde bdo bdr bdu bdy be- bea beb bed bee beo ber beu bey boa bob bod boe boo bor bou boy bra brb brd bre bro brr bru bry bua bub bud bue buo bur buu buy by- bya byd bye byo byr byu daa dab dad dae dao dar dau day dba dbb dbd dbe dbo dbr dbu dby dda ddb ddd dde ddo ddr ddu ddy de- dea deb ded dee deo der deu dey doa dob dod doe doo dor dou doy dra drb drd dre dro drr dru dry dua dub dud due duo dur duy dy- dya dyb dyd dye dyo dyr dyu dyy eaa eab ead eae eao ear eau eba ebb ebd ebe ebo ebr ebu eby ed- eda edb edd ede edo edr edu edy eea eeb eed eee eeo eer eey eo- eoa eob eod eoe eoo eor eou era erb erd ere ero err eru ery eu- eua eub eud eue eur eya eyd eye eyo eyr oaa oab oad oae oao oar oau ob- oba obb obd obe obo obr obu oby oda odb odd ode odo odr odu oea oeb oed oee oeo oer oey oo- ooa oob ood ooo oor or- ora orb ord ore oro orr oru ory ou- oua oud oue ouo our oya oyd oye oyo ra- raa rab rad rae rao rar rau ray rba rbb rbd rbe rbo rbr rbu rda rdb rdd rde rdo rdr rdu rdy re- rea reb red ree reo rer reu rey roa rob rod roe roo ror rou roy rra rrb rrd rrr rru rua rub rud rue ruo rur ruu ruy ry- rya ryd rye ryo ryr ryu ryy ua- uaa uab uad uae uao uar uau uay uba ubb ube ubo ubr ubu uby uda udb udd ude udo udr udu uea ueb ued uee uer uey uoa uob uod uoe uoo uor ur- ura urb urd ure uro urr uru ury uua uue uur uuu uyo uyu yaa yab yad yae yao yar yau yay ybe ybr yby yda yde ydo ydy yea yeb yed yee yeo yer yey yob yod yoe yoo yor you yoy yra yre yro yru yua yud yue yuo yur yuu yuy yyb yye yyu yyy