a-a a-b aaa aab aad aag aah aar ab- aba abb abd abg abh abr ad- ada adb add adg adh adr ag- aga agb agd agg agh agr aha ahb ahd ahg ahh ahr ar- ara arb ard arg arh arr baa bab bad bag bah bar bba bbb bbd bbg bbh bbr bda bdb bdd bdg bdh bdr bga bgb bgd bgg bgh bgr bha bhb bhd bhg bhh bhr bra brb brd brg brh brr daa dab dad dag dah dar dba dbb dbd dbg dbh dbr dda ddb ddd ddg ddh ddr dga dgd dgg dgh dgr dh- dha dhb dhd dhh dhr dra drb drd drg drr g-d gaa gab gad gag gah gar gba gbd gbg gbh gbr gda gdb gdd gdh gdr gga ggb ggd ggg ggh ggr gha ghb ghd ghg ghh ghr gra grb grd grg grh grr haa hab had hag hah har hba hbb hbd hbg hbh hbr hda hdb hdd hdg hdh hdr hga hgb hgg hgh hgr hha hhb hhd hhg hhh hhr hr- hra hrb hrd hrg hrh hrr ra- raa rab rad rag rah rar rba rbb rbd rbg rbh rbr rda rdb rdd rdg rdh rdr rga rgb rgd rgg rgh rgr rh- rha rhb rhd rhg rhh rhr rra rrb rrd rrg rrh rrr