a-a a-b a-t aaa aab aad aae aag aao aas aat ab- aba abb abd abe abg abo abs abt ad- ada adb add ade adg ado ads adt aea aeb aed aee aeg aeo aes aet ag- aga agb agd age agg ago ags agt aoa aob aod aoe aog aoo aos aot as- asa asb asd ase asg aso ass ast at- ata atb atd ate atg ato ats att baa bab bad bae bag bao bas bat bba bbb bbd bbe bbg bbo bbs bbt bda bdb bdd bde bdg bdo bds bdt be- bea beb bed bee beg beo bes bet bga bgb bgd bge bgg bgo bgs bgt boa bob bod boe bog boo bos bot bsa bsb bsd bse bsg bso bss bst bta btb btd bte btg bto bts btt daa dab dad dae dag dao das dat dba dbb dbd dbe dbg dbo dbs dbt dda ddb ddd dde ddg ddo dds ddt de- dea deb ded dee deg deo des det dga dgd dge dgg dgs dgt doa dob dod doe dog doo dos dot dsa dsb dsd dse dsg dso dss dst dta dtb dtd dte dtg dto dts dtt eaa eab ead eae eag eao eas eat eba ebb ebd ebe ebg ebo ebs ebt ed- eda edb edd ede edg edo eds edt eea eeb eed eee eeg eeo ees eet ega egb egd ege egg ego egs egt eo- eoa eob eod eoe eog eoo eos eot es- esa esb esd ese esg eso ess est eta etb etd ete etg eto ets ett g-d gaa gab gad gae gag gao gas gat gba gbd gbe gbg gbo gbs gbt gda gdb gdd gde gdo gds gdt ge- gea geb ged gee geg geo ges get gga ggb ggd ggg ggo ggs ggt goa gob god goe gog goo gos got gsa gsb gsd gse gsg gso gss gst gta gtb gtd gte gtg gto gts gtt oaa oab oad oae oag oao oas oat ob- oba obb obd obe obg obo obs obt oda odb odd ode odg odo ods odt oea oeb oed oee oeg oeo oes oet oga ogd oge ogg ogo ogs ogt oo- ooa oob ood oog ooo oos oot os- osa osb osd ose osg oso oss ost ot- ota otb otd ote otg oto ots ott saa sab sad sae sag sao sas sat sba sbb sbd sbe sbg sbo sbs sbt sda sdb sdd sde sdg sdo sds sdt se- sea seb sed see seg seo ses set sga sgb sgd sge sgg sgo sgs sgt soa sob sod soe sog soo sos sot ss- ssa ssb ssd sse ssg sso sss sst sta stb std ste stg sto sts stt taa tab tad tae tag tao tas tat tba tbb tbd tbe tbg tbo tbs tbt tda tdb tdd tde tdg tdo tds tdt te- tea teb ted tee teg teo tes tet tga tgb tge tgg tgo tgs tgt to- toa tob tod toe tog too tos tot tsa tsb tsd tse tsg tso tss tst tta ttb ttd tte ttg tto tts ttt