a-a a-b a-c aaa aab aac aae aag aau aav ab- aba abb abc abe abg abu abv ac- aca acb acc ace acg acu acv aea aeb aec aee aeg aeu aev ag- aga agb agc age agg agu agv au- aua aub auc aue aug auv av- ava avb avc ave avg avu b-u baa bab bac bae bag bau bav bba bbb bbc bbe bbg bbu bca bcb bcc bce bcg bcu bcv be- bea beb bec bee beg beu bev bga bgb bgc bge bgg bgu bgv bua bub buc bue bug buu bva bvb bvc bve bvg bvu bvv c-- caa cab cac cae cag cau cav cba cbb cbc cbe cbg cbu cbv cca ccb ccc cce ccg ccu ccv ce- cea ceb cec cee ceg ceu cev cga cgb cgc cge cgg cgu cgv cua cub cuc cue cug cuu cuv cva cvb cvc cve cvg cvu cvv eaa eab eac eae eag eau eav eba ebb ebc ebe ebg ebu ebv ec- eca ecb ecc ece ecg ecu ecv eea eeb eec eee eeg eev ega egb egc ege egg egu eu- eua eub euc eue eug euv eva evb evc eve evg evv gaa gab gac gae gag gau gav gba gbc gbe gbg gbu gbv gca gcb gcc gce gcg gcu ge- gea geb gec gee geg geu gev gga ggb ggc ggg ggu ggv gu- gua gub guc gue gug guu guv gva gvb gvc gve gvg gvu ua- uaa uab uac uae uag uau uav uba ubb ubc ube ubg ubu ubv uca ucb ucc uce ucg ucu ucv uea ueb uec uee ueg uga ugb ugc uge ugg ugu uua uuc uue uug uuu uva uvb uvc uve uvu uvv v-a v-e vaa vab vac vae vag vau vav vba vbc vbg vbv vca vcc vce vcu vea veb vec vee veg veu vga vgc vgg vgu vue vug vuv vva vvb vvc vvg vvv