-th a-a a-b a-t aaa aab aag aah aao aas aat ab- aba abb abg abh abo abs abt ag- aga agb agg agh ago ags agt aha ahb ahg ahh aho ahs aht aoa aob aog aoh aoo aos aot as- asa asb asg ash aso ass ast at- ata atb atg ath ato ats att baa bab bag bah bao bas bat bba bbb bbg bbh bbo bbs bbt bga bgb bgg bgh bgo bgs bgt bha bhb bhg bhh bho bhs bht boa bob bog boh boo bos bot bsa bsb bsg bsh bso bss bst bta btb btg bth bto bts btt gaa gab gag gah gao gas gat gba gbg gbh gbo gbs gbt gga ggb ggg ggh ggo ggs ggt gha ghb ghg ghh gho ghs ght goa gob gog goh goo gos got gsa gsb gsg gso gss gst gta gtb gtg gth gto gts gtt haa hab hag hah hao has hat hba hbb hbg hbh hbo hbs hbt hga hgb hgg hgh hgo hgs hgt hha hhb hhg hhh hho hhs hht hoa hob hog hoh hoo hos hot hsa hsb hsg hsh hss hst hta htb htg hth hto hts htt oaa oab oag oah oao oas oat ob- oba obb obg obh obo obs obt oga ogg ogh ogo ogs ogt oha ohg ohh oho ohs oht oo- ooa oob oog ooh ooo oos oot os- osa osb osg osh oso oss ost ot- ota otb otg oth oto ots ott saa sab sag sah sao sas sat sba sbb sbg sbh sbo sbs sbt sga sgb sgg sgh sgo sgs sgt sh- sha shb shg shh sho shs sht soa sob sog soh soo sos sot ss- ssa ssb ssg ssh sso sss sst sta stb stg sth sto sts stt taa tab tag tah tao tas tat tba tbb tbg tbh tbo tbs tbt tga tgb tgg tgh tgo tgs tgt th- tha thb thg thh tho ths tht to- toa tob tog toh too tos tot tsa tsb tsg tsh tso tss tst tta ttb ttg tth tto tts ttt