-er -ey a-a a-b aaa aab aad aae aan aar aau aay ab- aba abb abd abe abn abr abu aby ad- ada adb add ade adn adr adu ady aea aeb aed aee aen aer aeu aey an- ana anb and ane ann anr anu any ar- ara arb ard are arn arr aru ary au- aua aub aud aue aun aur ay- aya ayd aye ayn ayr ayu b-u baa bab bad bae ban bar bau bay bba bbb bbd bbe bbn bbr bbu bby bda bdb bdd bde bdr bdu bdy be- bea beb bed bee ben ber beu bey bna bnb bnd bne bnn bnr bnu bra brb brd bre brn brr bru bry bua bub bud bue bun bur buu buy by- bya byd bye byn byr byu daa dab dad dae dan dar dau day dba dbb dbd dbe dbn dbr dbu dby dda ddb ddd dde ddn ddr ddu ddy de- dea deb ded dee den der deu dey dna dnb dnd dne dnn dnr dny dra drb drd dre drn drr dru dry dua dub dud due dun dur duy dy- dya dyb dyd dye dyn dyr dyu dyy eaa eab ead eae ean ear eau eba ebb ebd ebe ebn ebr ebu eby ed- eda edb edd ede edn edr edu edy eea eeb eed eee een eer eey en- ena enb end ene enn enr enu eny era erb erd ere ern err eru ery eu- eua eub eud eue eun eur eya eyd eye eyn eyr naa nab nad nae nan nar nau nay nba nbb nbd nbe nbn nbr nbu nda ndb ndd nde ndn ndr ndu ndy ne- nea neb ned nee nen ner neu ney nna nnb nne nnn nnu nra nrb nrd nre nrn nrr nru nry nua nub nud nue nun nur nuu nuy nya nyd nye nyn nyu nyy ra- raa rab rad rae ran rar rau ray rba rbb rbd rbe rbn rbr rbu rda rdb rdd rde rdn rdr rdu rdy re- rea reb red ree ren rer reu rey rna rnb rnd rnn rnr rnu rny rra rrb rrd rrn rrr rru rua rub rud rue run rur ruu ruy ry- rya ryd rye ryn ryr ryu ryy ua- uaa uab uad uae uan uar uau uay uba ubb ube ubn ubr ubu uby uda udb udd ude udn udr udu uea ueb ued uee uen uer uey un- una unb und une unn unr unu uny ur- ura urb urd ure urn urr uru ury uua uue uun uur uuu uyu yaa yab yad yae yan yar yau yay ybe ybr yby yda yde ydn ydy yea yeb yed yee yen yer yey yna ynd yne ynn ynu yny yra yre yrn yru yua yud yue yun yur yuu yuy yyb yye yyu yyy