a-a a-b aaa aab aad aan aar aay ab- aba abb abd abn abr aby ad- ada adb add adn adr ady an- ana anb and ann anr any ar- ara arb ard arn arr ary ay- aya ayd ayn ayr baa bab bad ban bar bay bba bbb bbd bbn bbr bby bda bdb bdd bdr bdy bna bnb bnd bnn bnr bra brb brd brn brr bry by- bya byd byn byr daa dab dad dan dar day dba dbb dbd dbn dbr dby dda ddb ddd ddn ddr ddy dna dnb dnd dnn dnr dny dra drb drd drn drr dry dy- dya dyb dyd dyn dyr dyy naa nab nad nan nar nay nba nbb nbd nbn nbr nda ndb ndd ndn ndr ndy nna nnb nnn nra nrb nrd nrn nrr nry nya nyd nyn nyy ra- raa rab rad ran rar ray rba rbb rbd rbn rbr rda rdb rdd rdn rdr rdy rna rnb rnd rnn rnr rny rra rrb rrd rrn rrr ry- rya ryd ryn ryr ryy yaa yab yad yan yar yay ybr yby yda ydn ydy yna ynd ynn yny yra yrn yyb yyy