-th a-a a-b a-t aaa aab aag aah aas aat ab- aba abb abg abh abs abt ag- aga agb agg agh ags agt aha ahb ahg ahh ahs aht as- asa asb asg ash ass ast at- ata atb atg ath ats att baa bab bag bah bas bat bba bbb bbg bbh bbs bbt bga bgb bgg bgh bgs bgt bha bhb bhg bhh bhs bht bsa bsb bsg bsh bss bst bta btb btg bth bts btt gaa gab gag gah gas gat gba gbg gbh gbs gbt gga ggb ggg ggh ggs ggt gha ghb ghg ghh ghs ght gsa gsb gsg gss gst gta gtb gtg gth gts gtt haa hab hag hah has hat hba hbb hbg hbh hbs hbt hga hgb hgg hgh hgs hgt hha hhb hhg hhh hhs hht hsa hsb hsg hsh hss hst hta htb htg hth hts htt saa sab sag sah sas sat sba sbb sbg sbh sbs sbt sga sgb sgg sgh sgs sgt sh- sha shb shg shh shs sht ss- ssa ssb ssg ssh sss sst sta stb stg sth sts stt taa tab tag tah tas tat tba tbb tbg tbh tbs tbt tga tgb tgg tgh tgs tgt th- tha thb thg thh ths tht tsa tsb tsg tsh tss tst tta ttb ttg tth tts ttt