a-a a-b aaa aab aad aan aar aau aay ab- aba abb abd abn abr abu aby ad- ada adb add adn adr adu ady an- ana anb and ann anr anu any ar- ara arb ard arn arr aru ary au- aua aub aud aun aur ay- aya ayd ayn ayr ayu b-u baa bab bad ban bar bau bay bba bbb bbd bbn bbr bbu bby bda bdb bdd bdr bdu bdy bna bnb bnd bnn bnr bnu bra brb brd brn brr bru bry bua bub bud bun bur buu buy by- bya byd byn byr byu daa dab dad dan dar dau day dba dbb dbd dbn dbr dbu dby dda ddb ddd ddn ddr ddu ddy dna dnb dnd dnn dnr dny dra drb drd drn drr dru dry dua dub dud dun dur duy dy- dya dyb dyd dyn dyr dyu dyy naa nab nad nan nar nau nay nba nbb nbd nbn nbr nbu nda ndb ndd ndn ndr ndu ndy nna nnb nnn nnu nra nrb nrd nrn nrr nru nry nua nub nud nun nur nuu nuy nya nyd nyn nyu nyy ra- raa rab rad ran rar rau ray rba rbb rbd rbn rbr rbu rda rdb rdd rdn rdr rdu rdy rna rnb rnd rnn rnr rnu rny rra rrb rrd rrn rrr rru rua rub rud run rur ruu ruy ry- rya ryd ryn ryr ryu ryy ua- uaa uab uad uan uar uau uay uba ubb ubn ubr ubu uby uda udb udd udn udr udu un- una unb und unn unr unu uny ur- ura urb urd urn urr uru ury uua uun uur uuu uyu yaa yab yad yan yar yau yay ybr yby yda ydn ydy yna ynd ynn ynu yny yra yrn yru yua yud yun yur yuu yuy yyb yyu yyy