a-a a-b aaa aab aad aao aap aar aay ab- aba abb abd abo abp abr aby ad- ada adb add ado adp adr ady aoa aob aod aoo aop aor ap- apa apb apd apo app apr apy ar- ara arb ard aro arp arr ary ay- aya ayd ayo ayp ayr b-p baa bab bad bao bap bar bay bba bbb bbd bbo bbp bbr bby bda bdb bdd bdo bdp bdr bdy boa bob bod boo bop bor boy bpa bpb bpd bpo bpp bpr bpy bra brb brd bro brp brr bry by- bya byd byo byp byr daa dab dad dao dap dar day dba dbb dbd dbo dbp dbr dby dda ddb ddd ddo ddp ddr ddy doa dob dod doo dop dor doy dpa dpb dpd dpo dpp dpr dra drb drd dro drp drr dry dy- dya dyb dyd dyo dyp dyr dyy oaa oab oad oao oap oar ob- oba obb obd obo obp obr oby oda odb odd odo odp odr oo- ooa oob ood ooo oop oor op- opa opb opd opo opp opr opy or- ora orb ord oro orp orr ory oya oyd oyo p-p paa pab pad pao pap par pay pba pbb pbd pbo pbp pbr pby pda pdb pdd pdo pdp pdr poa pob pod poo pop por poy ppa ppb ppd ppo ppp ppr pra prb prd pro prp prr pry py- pya pyb pyd pyo pyr ra- raa rab rad rao rap rar ray rba rbb rbd rbo rbp rbr rda rdb rdd rdo rdp rdr rdy roa rob rod roo rop ror roy rpa rpb rpd rpo rpp rpr rra rrb rrd rrp rrr ry- rya ryd ryo ryr ryy yaa yab yad yao yap yar yay ybp ybr yby yda ydo ydy yob yod yoo yop yor yoy ypa ypd ypo yra yro yrp yyb yyy