a-a a-b aaa aab aad aan aao aap aar aay ab- aba abb abd abn abo abp abr aby ad- ada adb add adn ado adp adr ady an- ana anb and ann ano anp anr any aoa aob aod aon aoo aop aor ap- apa apb apd apn apo app apr apy ar- ara arb ard arn aro arp arr ary ay- aya ayd ayn ayo ayp ayr b-p baa bab bad ban bao bap bar bay bba bbb bbd bbn bbo bbp bbr bby bda bdb bdd bdo bdp bdr bdy bna bnb bnd bnn bno bnp bnr boa bob bod bon boo bop bor boy bpa bpb bpd bpn bpo bpp bpr bpy bra brb brd brn bro brp brr bry by- bya byd byn byo byp byr daa dab dad dan dao dap dar day dba dbb dbd dbn dbo dbp dbr dby dda ddb ddd ddn ddo ddp ddr ddy dna dnb dnd dnn dno dnp dnr dny doa dob dod don doo dop dor doy dpa dpb dpd dpn dpo dpp dpr dra drb drd drn dro drp drr dry dy- dya dyb dyd dyn dyo dyp dyr dyy naa nab nad nan nao nap nar nay nba nbb nbd nbn nbo nbp nbr nda ndb ndd ndn ndo ndp ndr ndy nna nnb nnn nno nnp no- noa nob nod non noo nop nor noy npa npb npd npn npo npp npr nra nrb nrd nrn nro nrp nrr nry nya nyd nyn nyo nyp nyy oaa oab oad oan oao oap oar ob- oba obb obd obn obo obp obr oby oda odb odd odn odo odp odr on- ona onb ond onn ono onp onr ony oo- ooa oob ood oon ooo oop oor op- opa opb opd opn opo opp opr opy or- ora orb ord orn oro orp orr ory oya oyd oyo p-p paa pab pad pan pao pap par pay pba pbb pbd pbn pbo pbp pbr pby pda pdb pdd pdn pdo pdp pdr pn- pna pnb pnd pnn pno pnp pnr pny poa pob pod pon poo pop por poy ppa ppb ppd ppn ppo ppp ppr pra prb prd prn pro prp prr pry py- pya pyb pyd pyn pyo pyr ra- raa rab rad ran rao rap rar ray rba rbb rbd rbn rbo rbp rbr rda rdb rdd rdn rdo rdp rdr rdy rna rnb rnd rnn rno rnp rnr rny roa rob rod ron roo rop ror roy rpa rpb rpd rpn rpo rpp rpr rra rrb rrd rrn rrp rrr ry- rya ryd ryn ryo ryr ryy yaa yab yad yan yao yap yar yay ybp ybr yby yda ydn ydo ydy yna ynd ynn ynp yny yob yod yon yoo yop yor yoy ypa ypd ypo yra yrn yro yrp yyb yyy