a-a a-b a-c aaa aab aac aag aah aak aan aau ab- aba abb abc abg abh abk abn abu ac- aca acb acc acg ach ack acn acu ag- aga agb agc agg agh agk agn agu aha ahb ahc ahg ahh ahk ahn ahu aka akb akc akg akh akk akn aku an- ana anb anc ang anh ank ann anu au- aua aub auc aug auh auk aun b-u baa bab bac bag bah bak ban bau bba bbb bbc bbg bbh bbk bbn bbu bca bcb bcc bcg bch bck bcn bcu bga bgb bgc bgg bgh bgk bgn bgu bha bhb bhc bhg bhh bhk bhu bka bkb bkc bkg bkk bkn bna bnb bnc bng bnk bnn bnu bua bub buc bug buh buk bun buu c-- caa cab cac cag cah cak can cau cba cbb cbc cbg cbh cbk cbn cbu cca ccb ccc ccg cch cck ccn ccu cga cgb cgc cgg cgh cgn cgu ch- cha chb chc chg chh chk chn chu cka ckb ckc ckh cn- cna cnb cnc cng cnh cnn cnu cua cub cuc cug cuh cuk cun cuu gaa gab gac gag gah gak gan gau gba gbc gbg gbh gbk gbn gbu gca gcb gcc gcg gch gck gcn gcu gga ggb ggc ggg ggh ggn ggu gha ghb ghc ghg ghh ghn gka gkb gkh gkn gna gnb gnc gnn gnu gu- gua gub guc gug guk gun guu haa hab hac hag hah hak han hau hba hbb hbc hbg hbh hbk hbn hbu hca hcb hcc hcg hch hck hcn hga hgb hgc hgg hgh hgk hgn hgu hha hhb hhc hhg hhh hhk hhn hhu hka hkb hkg hkh hkk hkn hku hna hnb hnc hng hnh hnk hnn hnu hua hub huc hug huh huk hun huu ka- kaa kab kac kag kah kak kan kau kba kbb kbc kbh kbk kbn kbu kca kcb kcc kcg kch kck kcn kcu kga kgb kgc kgh kgu kha khh khk khn khu kkb kkc kkh kkk kkn kku kn- kna knc kng knk knn knu kub kuc kug kuh kuk kun kuu naa nab nac nag nah nak nan nau nba nbb nbc nbg nbk nbn nbu nca ncb ncc ncg nch nck ncn ncu nga ngb ngc ngg ngh ngk ngn ngu nha nhb nhc nhg nhh nhk nhn nhu nka nkc nkk nkn nku nna nnb nnc nng nnh nnk nnn nnu nua nub nuc nug nuh nuk nun nuu ua- uaa uab uac uag uah uak uan uau uba ubb ubc ubg ubh ubk ubn ubu uca ucb ucc ucg uch uck ucn ucu uga ugb ugc ugg ugh ugk ugn ugu uha uhb uhc uhh uhu uka ukb ukc ukk ukn uku un- una unb unc ung unh unk unn unu uua uuc uug uun uuu