a-a a-b a-c aaa aab aac aag aau aav ab- aba abb abc abg abu abv ac- aca acb acc acg acu acv ag- aga agb agc agg agu agv au- aua aub auc aug auv av- ava avb avc avg avu b-u baa bab bac bag bau bav bba bbb bbc bbg bbu bca bcb bcc bcg bcu bcv bga bgb bgc bgg bgu bgv bua bub buc bug buu bva bvb bvc bvg bvu bvv c-- caa cab cac cag cau cav cba cbb cbc cbg cbu cbv cca ccb ccc ccg ccu ccv cga cgb cgc cgg cgu cgv cua cub cuc cug cuu cuv cva cvb cvc cvg cvu cvv gaa gab gac gag gau gav gba gbc gbg gbu gbv gca gcb gcc gcg gcu gga ggb ggc ggg ggu ggv gu- gua gub guc gug guu guv gva gvb gvc gvg gvu ua- uaa uab uac uag uau uav uba ubb ubc ubg ubu ubv uca ucb ucc ucg ucu ucv uga ugb ugc ugg ugu uua uuc uug uuu uva uvb uvc uvu uvv v-a vaa vab vac vag vau vav vba vbc vbg vbv vca vcc vcu vga vgc vgg vgu vug vuv vva vvb vvc vvg vvv