a-a a-b aaa aab aad aag aao aap aar ab- aba abb abd abg abo abp abr ad- ada adb add adg ado adp adr ag- aga agb agd agg ago agp agr aoa aob aod aog aoo aop aor ap- apa apb apd apg apo app apr ar- ara arb ard arg aro arp arr b-p baa bab bad bag bao bap bar bba bbb bbd bbg bbo bbp bbr bda bdb bdd bdg bdo bdp bdr bga bgb bgd bgg bgo bgp bgr boa bob bod bog boo bop bor bpa bpb bpd bpg bpo bpp bpr bra brb brd brg bro brp brr daa dab dad dag dao dap dar dba dbb dbd dbg dbo dbp dbr dda ddb ddd ddg ddo ddp ddr dga dgd dgg dgp dgr doa dob dod dog doo dop dor dpa dpb dpd dpg dpo dpp dpr dra drb drd drg dro drp drr g-d g-p gaa gab gad gag gao gap gar gba gbd gbg gbo gbp gbr gda gdb gdd gdo gdp gdr gga ggb ggd ggg ggo ggp ggr goa gob god gog goo gop gor gpa gpb gpd gpg gpo gpp gpr gra grb grd grg gro grp grr oaa oab oad oag oao oap oar ob- oba obb obd obg obo obp obr oda odb odd odg odo odp odr oga ogd ogg ogo ogp oo- ooa oob ood oog ooo oop oor op- opa opb opd opg opo opp opr or- ora orb ord org oro orp orr p-p paa pab pad pag pao pap par pba pbb pbd pbg pbo pbp pbr pda pdb pdd pdg pdo pdp pdr pga pgb pgd pgg pgo pgp pgr poa pob pod pog poo pop por ppa ppb ppd ppg ppo ppp ppr pra prb prd prg pro prp prr ra- raa rab rad rag rao rap rar rba rbb rbd rbg rbo rbp rbr rda rdb rdd rdg rdo rdp rdr rga rgb rgd rgg rgo rgp rgr roa rob rod rog roo rop ror rpa rpb rpd rpg rpo rpp rpr rra rrb rrd rrg rrp rrr