a-a a-b a-i a-t aaa aab aad aag aai aar aas aat ab- aba abb abd abg abi abr abs abt ad- ada adb add adg adi adr ads adt ag- aga agb agd agg agi agr ags agt ai- aia aib aid aig aii air ais ait ar- ara arb ard arg ari arr ars art as- asa asb asd asg asi asr ass ast at- ata atb atd atg ati atr ats att baa bab bad bag bai bar bas bat bba bbb bbd bbg bbi bbr bbs bbt bda bdb bdd bdg bdi bdr bds bdt bga bgb bgd bgg bgi bgr bgs bgt bi- bia bib bid big bii bir bis bit bra brb brd brg bri brr brs brt bsa bsb bsd bsg bsi bsr bss bst bta btb btd btg bti btr bts btt daa dab dad dag dai dar das dat dba dbb dbd dbg dbi dbr dbs dbt dda ddb ddd ddg ddi ddr dds ddt dga dgd dgg dgi dgr dgs dgt di- dia dib did dig dii dir dis dit dra drb drd drg dri drr drs drt dsa dsb dsd dsg dsi dsr dss dst dta dtb dtd dtg dti dtr dts dtt g-d gaa gab gad gag gai gar gas gat gba gbd gbg gbi gbr gbs gbt gda gdb gdd gdi gdr gds gdt gga ggb ggd ggg ggi ggr ggs ggt gia gib gid gig gii gir gis git gra grb grd grg gri grr grs grt gsa gsb gsd gsg gsi gsr gss gst gta gtb gtd gtg gti gtr gts gtt i-d ia- iaa iab iad iag iai iar ias iat iba ibb ibd ibg ibi ibr ibs ibt ida idb idd idg idi idr ids idt iga igb igd igg igi igr igs igt iia iib iid iii iir iis iit ir- ira irb ird irg iri irr irs irt is- isa isb isd isg isi isr iss ist ita itb itd itg iti its itt ra- raa rab rad rag rai rar ras rat rba rbb rbd rbg rbi rbr rbs rbt rda rdb rdd rdg rdi rdr rds rdt rga rgb rgd rgg rgi rgr rgs rgt ria rib rid rig rii rir ris rit rra rrb rrd rrg rri rrr rrs rrt rsa rsb rsd rsg rsi rsr rss rst rta rtb rtd rtg rti rtr rts rtt saa sab sad sag sai sar sas sat sba sbb sbd sbg sbi sbr sbs sbt sda sdb sdd sdg sdi sdr sds sdt sga sgb sgd sgg sgi sgr sgs sgt sia sib sid sig sii sir sis sit sr- sra srb srd srg sri srr srs srt ss- ssa ssb ssd ssg ssi ssr sss sst sta stb std stg sti str sts stt taa tab tad tag tai tar tas tat tba tbb tbd tbg tbi tbr tbs tbt tda tdb tdd tdg tdi tdr tds tdt tga tgb tgg tgi tgr tgs tgt tia tib tid tig tii tir tis tit tra trb trd trg tri trr trs trt tsa tsb tsd tsg tsi tsr tss tst tta ttb ttd ttg tti ttr tts ttt