a-a a-b a-t aaa aab aad aag aao aar aas aat ab- aba abb abd abg abo abr abs abt ad- ada adb add adg ado adr ads adt ag- aga agb agd agg ago agr ags agt aoa aob aod aog aoo aor aos aot ar- ara arb ard arg aro arr ars art as- asa asb asd asg aso asr ass ast at- ata atb atd atg ato atr ats att baa bab bad bag bao bar bas bat bba bbb bbd bbg bbo bbr bbs bbt bda bdb bdd bdg bdo bdr bds bdt bga bgb bgd bgg bgo bgr bgs bgt boa bob bod bog boo bor bos bot bra brb brd brg bro brr brs brt bsa bsb bsd bsg bso bsr bss bst bta btb btd btg bto btr bts btt daa dab dad dag dao dar das dat dba dbb dbd dbg dbo dbr dbs dbt dda ddb ddd ddg ddo ddr dds ddt dga dgd dgg dgr dgs dgt doa dob dod dog doo dor dos dot dra drb drd drg dro drr drs drt dsa dsb dsd dsg dso dsr dss dst dta dtb dtd dtg dto dtr dts dtt g-d gaa gab gad gag gao gar gas gat gba gbd gbg gbo gbr gbs gbt gda gdb gdd gdo gdr gds gdt gga ggb ggd ggg ggo ggr ggs ggt goa gob god gog goo gor gos got gra grb grd grg gro grr grs grt gsa gsb gsd gsg gso gsr gss gst gta gtb gtd gtg gto gtr gts gtt oaa oab oad oag oao oar oas oat ob- oba obb obd obg obo obr obs obt oda odb odd odg odo odr ods odt oga ogd ogg ogo ogs ogt oo- ooa oob ood oog ooo oor oos oot or- ora orb ord org oro orr ors ort os- osa osb osd osg oso osr oss ost ot- ota otb otd otg oto otr ots ott ra- raa rab rad rag rao rar ras rat rba rbb rbd rbg rbo rbr rbs rbt rda rdb rdd rdg rdo rdr rds rdt rga rgb rgd rgg rgo rgr rgs rgt roa rob rod rog roo ror ros rot rra rrb rrd rrg rrr rrs rrt rsa rsb rsd rsg rso rsr rss rst rta rtb rtd rtg rto rtr rts rtt saa sab sad sag sao sar sas sat sba sbb sbd sbg sbo sbr sbs sbt sda sdb sdd sdg sdo sdr sds sdt sga sgb sgd sgg sgo sgr sgs sgt soa sob sod sog soo sor sos sot sr- sra srb srd srg sro srr srs srt ss- ssa ssb ssd ssg sso ssr sss sst sta stb std stg sto str sts stt taa tab tad tag tao tar tas tat tba tbb tbd tbg tbo tbr tbs tbt tda tdb tdd tdg tdo tdr tds tdt tga tgb tgg tgo tgr tgs tgt to- toa tob tod tog too tor tos tot tra trb trd trg tro trr trs trt tsa tsb tsd tsg tso tsr tss tst tta ttb ttd ttg tto ttr tts ttt