a-a a-b a-t aaa aab aad aag aao aas aat ab- aba abb abd abg abo abs abt ad- ada adb add adg ado ads adt ag- aga agb agd agg ago ags agt aoa aob aod aog aoo aos aot as- asa asb asd asg aso ass ast at- ata atb atd atg ato ats att baa bab bad bag bao bas bat bba bbb bbd bbg bbo bbs bbt bda bdb bdd bdg bdo bds bdt bga bgb bgd bgg bgo bgs bgt boa bob bod bog boo bos bot bsa bsb bsd bsg bso bss bst bta btb btd btg bto bts btt daa dab dad dag dao das dat dba dbb dbd dbg dbo dbs dbt dda ddb ddd ddg ddo dds ddt dga dgd dgg dgs dgt doa dob dod dog doo dos dot dsa dsb dsd dsg dso dss dst dta dtb dtd dtg dto dts dtt g-d gaa gab gad gag gao gas gat gba gbd gbg gbo gbs gbt gda gdb gdd gdo gds gdt gga ggb ggd ggg ggo ggs ggt goa gob god gog goo gos got gsa gsb gsd gsg gso gss gst gta gtb gtd gtg gto gts gtt oaa oab oad oag oao oas oat ob- oba obb obd obg obo obs obt oda odb odd odg odo ods odt oga ogd ogg ogo ogs ogt oo- ooa oob ood oog ooo oos oot os- osa osb osd osg oso oss ost ot- ota otb otd otg oto ots ott saa sab sad sag sao sas sat sba sbb sbd sbg sbo sbs sbt sda sdb sdd sdg sdo sds sdt sga sgb sgd sgg sgo sgs sgt soa sob sod sog soo sos sot ss- ssa ssb ssd ssg sso sss sst sta stb std stg sto sts stt taa tab tad tag tao tas tat tba tbb tbd tbg tbo tbs tbt tda tdb tdd tdg tdo tds tdt tga tgb tgg tgo tgs tgt to- toa tob tod tog too tos tot tsa tsb tsd tsg tso tss tst tta ttb ttd ttg tto tts ttt