a-a a-b aaa aab aad aan aao aar aay ab- aba abb abd abn abo abr aby ad- ada adb add adn ado adr ady an- ana anb and ann ano anr any aoa aob aod aon aoo aor ar- ara arb ard arn aro arr ary ay- aya ayd ayn ayo ayr baa bab bad ban bao bar bay bba bbb bbd bbn bbo bbr bby bda bdb bdd bdo bdr bdy bna bnb bnd bnn bno bnr boa bob bod bon boo bor boy bra brb brd brn bro brr bry by- bya byd byn byo byr daa dab dad dan dao dar day dba dbb dbd dbn dbo dbr dby dda ddb ddd ddn ddo ddr ddy dna dnb dnd dnn dno dnr dny doa dob dod don doo dor doy dra drb drd drn dro drr dry dy- dya dyb dyd dyn dyo dyr dyy naa nab nad nan nao nar nay nba nbb nbd nbn nbo nbr nda ndb ndd ndn ndo ndr ndy nna nnb nnn nno no- noa nob nod non noo nor noy nra nrb nrd nrn nro nrr nry nya nyd nyn nyo nyy oaa oab oad oan oao oar ob- oba obb obd obn obo obr oby oda odb odd odn odo odr on- ona onb ond onn ono onr ony oo- ooa oob ood oon ooo oor or- ora orb ord orn oro orr ory oya oyd oyo ra- raa rab rad ran rao rar ray rba rbb rbd rbn rbo rbr rda rdb rdd rdn rdo rdr rdy rna rnb rnd rnn rno rnr rny roa rob rod ron roo ror roy rra rrb rrd rrn rrr ry- rya ryd ryn ryo ryr ryy yaa yab yad yan yao yar yay ybr yby yda ydn ydo ydy yna ynd ynn yny yob yod yon yoo yor yoy yra yrn yro yyb yyy