a-a a-b a-c aaa aab aac aag aan aao aau aav ab- aba abb abc abg abn abo abu abv ac- aca acb acc acg acn aco acu acv ag- aga agb agc agg agn ago agu agv an- ana anb anc ang ann ano anu anv aoa aob aoc aog aon aoo aou aov au- aua aub auc aug aun auo auv av- ava avb avc avg avn avo avu b-u baa bab bac bag ban bao bau bav bba bbb bbc bbg bbn bbo bbu bca bcb bcc bcg bcn bco bcu bcv bga bgb bgc bgg bgn bgo bgu bgv bna bnb bnc bng bnn bno bnu bnv boa bob boc bog bon boo bou bov bua bub buc bug bun buo buu bva bvb bvc bvg bvn bvo bvu bvv c-- caa cab cac cag can cao cau cav cba cbb cbc cbg cbn cbo cbu cbv cca ccb ccc ccg ccn cco ccu ccv cga cgb cgc cgg cgn cgo cgu cgv cn- cna cnb cnc cng cnn cno cnu cnv co- coa cob coc cog con coo cou cov cua cub cuc cug cun cuo cuu cuv cva cvb cvc cvg cvn cvo cvu cvv gaa gab gac gag gan gao gau gav gba gbc gbg gbn gbo gbu gbv gca gcb gcc gcg gcn gco gcu gga ggb ggc ggg ggn ggo ggu ggv gna gnb gnc gnn gno gnu gnv goa gob goc gog gon goo gou gov gu- gua gub guc gug gun guo guu guv gva gvb gvc gvg gvn gvo gvu naa nab nac nag nan nao nau nav nba nbb nbc nbg nbn nbo nbu nbv nca ncb ncc ncg ncn nco ncu ncv nga ngb ngc ngg ngn ngo ngu nna nnb nnc nng nnn nno nnu nnv no- noa nob noc nog non noo nou nov nua nub nuc nug nun nuo nuu nuv nva nvb nvc nvg nvn nvu nvv oaa oab oac oag oan oao oau oav ob- oba obb obc obg obn obo obu obv oc- oca ocb occ ocg ocn oco ocu ocv oga ogc ogg ogn ogo on- ona onb onc ong onn ono onu oo- ooa oob ooc oog oon ooo oov ou- oua ouc oun ouo ov- ova ovb ovc ovo ovv ua- uaa uab uac uag uan uao uau uav uba ubb ubc ubg ubn ubo ubu ubv uca ucb ucc ucg ucn uco ucu ucv uga ugb ugc ugg ugn ugo ugu un- una unb unc ung unn uno unu unv uoa uob uoc uog uon uoo uua uuc uug uun uuu uva uvb uvc uvo uvu uvv v-a vaa vab vac vag van vao vau vav vba vbc vbg vbo vbv vca vcc vcn vco vcu vga vgc vgg vgn vgo vgu vn- vna vng vno vnu vnv voa vob voc vog von voo vou vov vug vuv vva vvb vvc vvg vvo vvv