a-a a-b a-i a-t aaa aab aad aae aag aai aas aat ab- aba abb abd abe abg abi abs abt ad- ada adb add ade adg adi ads adt aea aeb aed aee aeg aei aes aet ag- aga agb agd age agg agi ags agt ai- aia aib aid aie aig aii ais ait as- asa asb asd ase asg asi ass ast at- ata atb atd ate atg ati ats att baa bab bad bae bag bai bas bat bba bbb bbd bbe bbg bbi bbs bbt bda bdb bdd bde bdg bdi bds bdt be- bea beb bed bee beg bei bes bet bga bgb bgd bge bgg bgi bgs bgt bi- bia bib bid bie big bii bis bit bsa bsb bsd bse bsg bsi bss bst bta btb btd bte btg bti bts btt daa dab dad dae dag dai das dat dba dbb dbd dbe dbg dbi dbs dbt dda ddb ddd dde ddg ddi dds ddt de- dea deb ded dee deg dei des det dga dgd dge dgg dgi dgs dgt di- dia dib did die dig dii dis dit dsa dsb dsd dse dsg dsi dss dst dta dtb dtd dte dtg dti dts dtt eaa eab ead eae eag eai eas eat eba ebb ebd ebe ebg ebi ebs ebt ed- eda edb edd ede edg edi eds edt eea eeb eed eee eeg ees eet ega egb egd ege egg egi egs egt eia eib eid eie eig eii eis eit es- esa esb esd ese esg esi ess est eta etb etd ete etg eti ets ett g-d gaa gab gad gae gag gai gas gat gba gbd gbe gbg gbi gbs gbt gda gdb gdd gde gdi gds gdt ge- gea geb ged gee geg gei ges get gga ggb ggd ggg ggi ggs ggt gia gib gid gie gig gii gis git gsa gsb gsd gse gsg gsi gss gst gta gtb gtd gte gtg gti gts gtt i-d ia- iaa iab iad iae iag iai ias iat iba ibb ibd ibe ibg ibi ibs ibt ida idb idd ide idg idi ids idt ie- iea ied iee ieg iei ies iet iga igb igd ige igg igi igs igt iia iib iid iie iii iis iit is- isa isb isd ise isg isi iss ist ita itb itd ite itg iti its itt saa sab sad sae sag sai sas sat sba sbb sbd sbe sbg sbi sbs sbt sda sdb sdd sde sdg sdi sds sdt se- sea seb sed see seg sei ses set sga sgb sgd sge sgg sgi sgs sgt sia sib sid sie sig sii sis sit ss- ssa ssb ssd sse ssg ssi sss sst sta stb std ste stg sti sts stt taa tab tad tae tag tai tas tat tba tbb tbd tbe tbg tbi tbs tbt tda tdb tdd tde tdg tdi tds tdt te- tea teb ted tee teg tei tes tet tga tgb tge tgg tgi tgs tgt tia tib tid tie tig tii tis tit tsa tsb tsd tse tsg tsi tss tst tta ttb ttd tte ttg tti tts ttt