a-a a-b aaa aab aad aah aao aar aay ab- aba abb abd abh abo abr aby ad- ada adb add adh ado adr ady aha ahb ahd ahh aho ahr ahy aoa aob aod aoh aoo aor ar- ara arb ard arh aro arr ary ay- aya ayd ayh ayo ayr baa bab bad bah bao bar bay bba bbb bbd bbh bbo bbr bby bda bdb bdd bdh bdo bdr bdy bha bhb bhd bhh bho bhr boa bob bod boh boo bor boy bra brb brd brh bro brr bry by- bya byd byh byo byr daa dab dad dah dao dar day dba dbb dbd dbh dbo dbr dby dda ddb ddd ddh ddo ddr ddy dh- dha dhb dhd dhh dho dhr doa dob dod doh doo dor doy dra drb drd dro drr dry dy- dya dyb dyd dyo dyr dyy haa hab had hah hao har hay hba hbb hbd hbh hbo hbr hby hda hdb hdd hdh hdo hdr hdy hha hhb hhd hhh hho hhr hhy hoa hob hod hoh hoo hor hoy hr- hra hrb hrd hrh hro hrr hy- hya hyb hyd hyh hyo hyr hyy oaa oab oad oah oao oar ob- oba obb obd obh obo obr oby oda odb odd odh odo odr oha ohd ohh oho ohr oo- ooa oob ood ooh ooo oor or- ora orb ord orh oro orr ory oya oyd oyo ra- raa rab rad rah rao rar ray rba rbb rbd rbh rbo rbr rda rdb rdd rdh rdo rdr rdy rh- rha rhb rhd rhh rho rhr roa rob rod roh roo ror roy rra rrb rrd rrh rrr ry- rya ryd ryo ryr ryy yaa yab yad yah yao yar yay ybr yby yda ydo ydy yha yob yod yoo yor yoy yra yro yyb yyy