-er a-a a-b aaa aab aad aae aag aar aav ab- aba abb abd abe abg abr abv ad- ada adb add ade adg adr adv aea aeb aed aee aeg aer aev ag- aga agb agd age agg agr agv ar- ara arb ard are arg arr arv av- ava avb avd ave avg avr baa bab bad bae bag bar bav bba bbb bbd bbe bbg bbr bda bdb bdd bde bdg bdr bdv be- bea beb bed bee beg ber bev bga bgb bgd bge bgg bgr bgv bra brb brd bre brg brr brv bva bvb bvd bve bvg bvr bvv daa dab dad dae dag dar dav dba dbb dbd dbe dbg dbr dbv dda ddb ddd dde ddg ddr de- dea deb ded dee deg der dev dga dgd dge dgg dgr dra drb drd dre drg drr drv dva dvb dvd dve dvg dvr eaa eab ead eae eag ear eav eba ebb ebd ebe ebg ebr ebv ed- eda edb edd ede edg edr eea eeb eed eee eeg eer eev ega egb egd ege egg egr era erb erd ere erg err erv eva evb evd eve evg evr evv g-d gaa gab gad gae gag gar gav gba gbd gbe gbg gbr gbv gda gdb gdd gde gdr gdv ge- gea geb ged gee geg ger gev gga ggb ggd ggg ggr ggv gra grb grd gre grg grr grv gva gvb gvd gve gvg gvr ra- raa rab rad rae rag rar rav rba rbb rbd rbe rbg rbr rda rdb rdd rde rdg rdr rdv re- rea reb red ree reg rer rev rga rgb rgd rge rgg rgr rgv rra rrb rrd rrg rrr rva rvb rvd rve rvg rvr rvv v-a v-e vaa vab vad vae vag var vav vba vbd vbg vbr vbv vdb vdd vde vdg vdr vdv vea veb ved vee veg ver vga vgg vgr vra vrb vrd vre vrg vrr vva vvb vvg vvr vvv