a-a a-t aaa aad aaf aag aao aat ad- ada add adf adg ado adt af- afa afd aff afg afo aft ag- aga agd agf agg ago agt aoa aod aof aog aoo aot at- ata atd atf atg ato att daa dad daf dag dao dat dda ddd ddf ddg ddo ddt dfa dfd dff dfg dfo dft dga dgd dgf dgg dgt doa dod dof dog doo dot dta dtd dtf dtg dto dtt faa fad faf fag fao fat fda fdd fdf fdg fdo fdt ffa ffd fff ffg ffo fft fga fgd fgf fgg fgt foa fof fog foo fot fta ftd ftf ftg fto ftt g-d gaa gad gaf gag gao gat gda gdd gdf gdo gdt gfa gfd gff gfo gft gga ggd ggg ggo ggt goa god gof gog goo got gta gtd gtf gtg gto gtt oaa oad oaf oag oao oat oda odd odf odg odo odt of- ofa ofd off ofg ofo oft oga ogd ogf ogg ogo ogt oo- ooa ood oof oog ooo oot ot- ota otd otf otg oto ott taa tad taf tag tao tat tda tdd tdf tdg tdo tdt tfa tfd tff tfg tfo tft tga tgf tgg tgo tgt to- toa tod tof tog too tot tta ttd ttf ttg tto ttt