a-a a-b a-c aaa aab aac aag aah aan aau ab- aba abb abc abg abh abn abu ac- aca acb acc acg ach acn acu ag- aga agb agc agg agh agn agu aha ahb ahc ahg ahh ahn ahu an- ana anb anc ang anh ann anu au- aua aub auc aug auh aun b-u baa bab bac bag bah ban bau bba bbb bbc bbg bbh bbn bbu bca bcb bcc bcg bch bcn bcu bga bgb bgc bgg bgh bgn bgu bha bhb bhc bhg bhh bhu bna bnb bnc bng bnn bnu bua bub buc bug buh bun buu c-- caa cab cac cag cah can cau cba cbb cbc cbg cbh cbn cbu cca ccb ccc ccg cch ccn ccu cga cgb cgc cgg cgh cgn cgu ch- cha chb chc chg chh chn chu cn- cna cnb cnc cng cnh cnn cnu cua cub cuc cug cuh cun cuu gaa gab gac gag gah gan gau gba gbc gbg gbh gbn gbu gca gcb gcc gcg gch gcn gcu gga ggb ggc ggg ggh ggn ggu gha ghb ghc ghg ghh ghn gna gnb gnc gnn gnu gu- gua gub guc gug gun guu haa hab hac hag hah han hau hba hbb hbc hbg hbh hbn hbu hca hcb hcc hcg hch hcn hga hgb hgc hgg hgh hgn hgu hha hhb hhc hhg hhh hhn hhu hna hnb hnc hng hnh hnn hnu hua hub huc hug huh hun huu naa nab nac nag nah nan nau nba nbb nbc nbg nbn nbu nca ncb ncc ncg nch ncn ncu nga ngb ngc ngg ngh ngn ngu nha nhb nhc nhg nhh nhn nhu nna nnb nnc nng nnh nnn nnu nua nub nuc nug nuh nun nuu ua- uaa uab uac uag uah uan uau uba ubb ubc ubg ubh ubn ubu uca ucb ucc ucg uch ucn ucu uga ugb ugc ugg ugh ugn ugu uha uhb uhc uhh uhu un- una unb unc ung unh unn unu uua uuc uug uun uuu