a-a a-b aaa aab aad aag aan aao aar ab- aba abb abd abg abn abo abr ad- ada adb add adg adn ado adr ag- aga agb agd agg agn ago agr an- ana anb and ang ann ano anr aoa aob aod aog aon aoo aor ar- ara arb ard arg arn aro arr baa bab bad bag ban bao bar bba bbb bbd bbg bbn bbo bbr bda bdb bdd bdg bdo bdr bga bgb bgd bgg bgn bgo bgr bna bnb bnd bng bnn bno bnr boa bob bod bog bon boo bor bra brb brd brg brn bro brr daa dab dad dag dan dao dar dba dbb dbd dbg dbn dbo dbr dda ddb ddd ddg ddn ddo ddr dga dgd dgg dgn dgr dna dnb dnd dng dnn dno dnr doa dob dod dog don doo dor dra drb drd drg drn dro drr g-d gaa gab gad gag gan gao gar gba gbd gbg gbn gbo gbr gda gdb gdd gdn gdo gdr gga ggb ggd ggg ggn ggo ggr gna gnb gnd gnn gno gnr goa gob god gog gon goo gor gra grb grd grg grn gro grr naa nab nad nag nan nao nar nba nbb nbd nbg nbn nbo nbr nda ndb ndd ndg ndn ndo ndr nga ngb ngd ngg ngn ngo nna nnb nng nnn nno no- noa nob nod nog non noo nor nra nrb nrd nrg nrn nro nrr oaa oab oad oag oan oao oar ob- oba obb obd obg obn obo obr oda odb odd odg odn odo odr oga ogd ogg ogn ogo on- ona onb ond ong onn ono onr oo- ooa oob ood oog oon ooo oor or- ora orb ord org orn oro orr ra- raa rab rad rag ran rao rar rba rbb rbd rbg rbn rbo rbr rda rdb rdd rdg rdn rdo rdr rga rgb rgd rgg rgn rgo rgr rna rnb rnd rng rnn rno rnr roa rob rod rog ron roo ror rra rrb rrd rrg rrn rrr