a-a a-b a-i a-t aaa aab aad aag aai aas aat ab- aba abb abd abg abi abs abt ad- ada adb add adg adi ads adt ag- aga agb agd agg agi ags agt ai- aia aib aid aig aii ais ait as- asa asb asd asg asi ass ast at- ata atb atd atg ati ats att baa bab bad bag bai bas bat bba bbb bbd bbg bbi bbs bbt bda bdb bdd bdg bdi bds bdt bga bgb bgd bgg bgi bgs bgt bi- bia bib bid big bii bis bit bsa bsb bsd bsg bsi bss bst bta btb btd btg bti bts btt daa dab dad dag dai das dat dba dbb dbd dbg dbi dbs dbt dda ddb ddd ddg ddi dds ddt dga dgd dgg dgi dgs dgt di- dia dib did dig dii dis dit dsa dsb dsd dsg dsi dss dst dta dtb dtd dtg dti dts dtt g-d gaa gab gad gag gai gas gat gba gbd gbg gbi gbs gbt gda gdb gdd gdi gds gdt gga ggb ggd ggg ggi ggs ggt gia gib gid gig gii gis git gsa gsb gsd gsg gsi gss gst gta gtb gtd gtg gti gts gtt i-d ia- iaa iab iad iag iai ias iat iba ibb ibd ibg ibi ibs ibt ida idb idd idg idi ids idt iga igb igd igg igi igs igt iia iib iid iii iis iit is- isa isb isd isg isi iss ist ita itb itd itg iti its itt saa sab sad sag sai sas sat sba sbb sbd sbg sbi sbs sbt sda sdb sdd sdg sdi sds sdt sga sgb sgd sgg sgi sgs sgt sia sib sid sig sii sis sit ss- ssa ssb ssd ssg ssi sss sst sta stb std stg sti sts stt taa tab tad tag tai tas tat tba tbb tbd tbg tbi tbs tbt tda tdb tdd tdg tdi tds tdt tga tgb tgg tgi tgs tgt tia tib tid tig tii tis tit tsa tsb tsd tsg tsi tss tst tta ttb ttd ttg tti tts ttt