a-a a-b aaa aab aae aag aau aav ab- aba abb abe abg abu abv aea aeb aee aeg aeu aev ag- aga agb age agg agu agv au- aua aub aue aug auv av- ava avb ave avg avu b-u baa bab bae bag bau bav bba bbb bbe bbg bbu be- bea beb bee beg beu bev bga bgb bge bgg bgu bgv bua bub bue bug buu bva bvb bve bvg bvu bvv eaa eab eae eag eau eav eba ebb ebe ebg ebu ebv eea eeb eee eeg eev ega egb ege egg egu eu- eua eub eue eug euv eva evb eve evg evv gaa gab gae gag gau gav gba gbe gbg gbu gbv ge- gea geb gee geg geu gev gga ggb ggg ggu ggv gu- gua gub gue gug guu guv gva gvb gve gvg gvu ua- uaa uab uae uag uau uav uba ubb ube ubg ubu ubv uea ueb uee ueg uga ugb uge ugg ugu uua uue uug uuu uva uvb uve uvu uvv v-a v-e vaa vab vae vag vau vav vba vbg vbv vea veb vee veg veu vga vgg vgu vue vug vuv vva vvb vvg vvv