a-a a-b a-t aaa aab aag aar aat aav ab- aba abb abg abr abt abv ag- aga agb agg agr agt agv ar- ara arb arg arr art arv at- ata atb atg atr att atv av- ava avb avg avr avt baa bab bag bar bat bav bba bbb bbg bbr bbt bga bgb bgg bgr bgt bgv bra brb brg brr brt brv bta btb btg btr btt btv bva bvb bvg bvr bvt bvv gaa gab gag gar gat gav gba gbg gbr gbt gbv gga ggb ggg ggr ggt ggv gra grb grg grr grt grv gta gtb gtg gtr gtt gtv gva gvb gvg gvr gvt ra- raa rab rag rar rat rav rba rbb rbg rbr rbt rga rgb rgg rgr rgt rgv rra rrb rrg rrr rrt rta rtb rtg rtr rtt rtv rva rvb rvg rvr rvt rvv taa tab tag tar tat tav tba tbb tbg tbr tbt tbv tga tgb tgg tgr tgt tgv tra trb trg trr trt trv tta ttb ttg ttr ttt ttv tva tvb tvg tvr tvt v-a vaa vab vag var vat vav vba vbg vbr vbv vga vgg vgr vgt vra vrb vrg vrr vrt vta vtb vtg vtr vtt vtv vva vvb vvg vvr vvt vvv