a-a a-b a-i a-t aaa aab aad aag aai aar aat ab- aba abb abd abg abi abr abt ad- ada adb add adg adi adr adt ag- aga agb agd agg agi agr agt ai- aia aib aid aig aii air ait ar- ara arb ard arg ari arr art at- ata atb atd atg ati atr att baa bab bad bag bai bar bat bba bbb bbd bbg bbi bbr bbt bda bdb bdd bdg bdi bdr bdt bga bgb bgd bgg bgi bgr bgt bi- bia bib bid big bii bir bit bra brb brd brg bri brr brt bta btb btd btg bti btr btt daa dab dad dag dai dar dat dba dbb dbd dbg dbi dbr dbt dda ddb ddd ddg ddi ddr ddt dga dgd dgg dgi dgr dgt di- dia dib did dig dii dir dit dra drb drd drg dri drr drt dta dtb dtd dtg dti dtr dtt g-d gaa gab gad gag gai gar gat gba gbd gbg gbi gbr gbt gda gdb gdd gdi gdr gdt gga ggb ggd ggg ggi ggr ggt gia gib gid gig gii gir git gra grb grd grg gri grr grt gta gtb gtd gtg gti gtr gtt i-d ia- iaa iab iad iag iai iar iat iba ibb ibd ibg ibi ibr ibt ida idb idd idg idi idr idt iga igb igd igg igi igr igt iia iib iid iii iir iit ir- ira irb ird irg iri irr irt ita itb itd itg iti itt ra- raa rab rad rag rai rar rat rba rbb rbd rbg rbi rbr rbt rda rdb rdd rdg rdi rdr rdt rga rgb rgd rgg rgi rgr rgt ria rib rid rig rii rir rit rra rrb rrd rrg rri rrr rrt rta rtb rtd rtg rti rtr rtt taa tab tad tag tai tar tat tba tbb tbd tbg tbi tbr tbt tda tdb tdd tdg tdi tdr tdt tga tgb tgg tgi tgr tgt tia tib tid tig tii tir tit tra trb trd trg tri trr trt tta ttb ttd ttg tti ttr ttt