a-a a-b a-t aaa aab aad aag aan aar aat ab- aba abb abd abg abn abr abt ad- ada adb add adg adn adr adt ag- aga agb agd agg agn agr agt an- ana anb and ang ann anr ant ar- ara arb ard arg arn arr art at- ata atb atd atg atn atr att baa bab bad bag ban bar bat bba bbb bbd bbg bbn bbr bbt bda bdb bdd bdg bdr bdt bga bgb bgd bgg bgn bgr bgt bna bnb bnd bng bnn bnr bnt bra brb brd brg brn brr brt bta btb btd btg btn btr btt daa dab dad dag dan dar dat dba dbb dbd dbg dbn dbr dbt dda ddb ddd ddg ddn ddr ddt dga dgd dgg dgn dgr dgt dna dnb dnd dng dnn dnr dnt dra drb drd drg drn drr drt dta dtb dtd dtg dtn dtr dtt g-d gaa gab gad gag gan gar gat gba gbd gbg gbn gbr gbt gda gdb gdd gdn gdr gdt gga ggb ggd ggg ggn ggr ggt gna gnb gnd gnn gnr gnt gra grb grd grg grn grr grt gta gtb gtd gtg gtn gtr gtt naa nab nad nag nan nar nat nba nbb nbd nbg nbn nbr nbt nda ndb ndd ndg ndn ndr ndt nga ngb ngd ngg ngn ngt nna nnb nng nnn nnt nra nrb nrd nrg nrn nrr nrt nta ntb ntd ntg ntn ntr ntt ra- raa rab rad rag ran rar rat rba rbb rbd rbg rbn rbr rbt rda rdb rdd rdg rdn rdr rdt rga rgb rgd rgg rgn rgr rgt rna rnb rnd rng rnn rnr rnt rra rrb rrd rrg rrn rrr rrt rta rtb rtd rtg rtn rtr rtt taa tab tad tag tan tar tat tba tbb tbd tbg tbn tbr tbt tda tdb tdd tdg tdn tdr tdt tga tgb tgg tgn tgr tgt tna tnb tnd tng tnn tnr tnt tra trb trd trg trn trr trt tta ttb ttd ttg ttn ttr ttt