a-a a-b a-t aaa aab aad aae aag aas aat ab- aba abb abd abe abg abs abt ad- ada adb add ade adg ads adt aea aeb aed aee aeg aes aet ag- aga agb agd age agg ags agt as- asa asb asd ase asg ass ast at- ata atb atd ate atg ats att baa bab bad bae bag bas bat bba bbb bbd bbe bbg bbs bbt bda bdb bdd bde bdg bds bdt be- bea beb bed bee beg bes bet bga bgb bgd bge bgg bgs bgt bsa bsb bsd bse bsg bss bst bta btb btd bte btg bts btt daa dab dad dae dag das dat dba dbb dbd dbe dbg dbs dbt dda ddb ddd dde ddg dds ddt de- dea deb ded dee deg des det dga dgd dge dgg dgs dgt dsa dsb dsd dse dsg dss dst dta dtb dtd dte dtg dts dtt eaa eab ead eae eag eas eat eba ebb ebd ebe ebg ebs ebt ed- eda edb edd ede edg eds edt eea eeb eed eee eeg ees eet ega egb egd ege egg egs egt es- esa esb esd ese esg ess est eta etb etd ete etg ets ett g-d gaa gab gad gae gag gas gat gba gbd gbe gbg gbs gbt gda gdb gdd gde gds gdt ge- gea geb ged gee geg ges get gga ggb ggd ggg ggs ggt gsa gsb gsd gse gsg gss gst gta gtb gtd gte gtg gts gtt saa sab sad sae sag sas sat sba sbb sbd sbe sbg sbs sbt sda sdb sdd sde sdg sds sdt se- sea seb sed see seg ses set sga sgb sgd sge sgg sgs sgt ss- ssa ssb ssd sse ssg sss sst sta stb std ste stg sts stt taa tab tad tae tag tas tat tba tbb tbd tbe tbg tbs tbt tda tdb tdd tde tdg tds tdt te- tea teb ted tee teg tes tet tga tgb tge tgg tgs tgt tsa tsb tsd tse tsg tss tst tta ttb ttd tte ttg tts ttt