a-a a-b aaa aab aag aak aan aao aau ab- aba abb abg abk abn abo abu ag- aga agb agg agk agn ago agu aka akb akg akk akn ako aku an- ana anb ang ank ann ano anu aoa aob aog aok aon aoo aou au- aua aub aug auk aun auo b-u baa bab bag bak ban bao bau bba bbb bbg bbk bbn bbo bbu bga bgb bgg bgk bgn bgo bgu bka bkb bkg bkk bkn bko bna bnb bng bnk bnn bno bnu boa bob bog bok bon boo bou bua bub bug buk bun buo buu gaa gab gag gak gan gao gau gba gbg gbk gbn gbo gbu gga ggb ggg ggn ggo ggu gka gkb gkn gko gna gnb gnn gno gnu goa gob gog gok gon goo gou gu- gua gub gug guk gun guo guu ka- kaa kab kag kak kan kao kau kba kbb kbk kbn kbo kbu kga kgb kgo kgu kkb kkk kkn kku kn- kna kng knk knn kno knu koa kob kog kok kon koo kou kub kug kuk kun kuu naa nab nag nak nan nao nau nba nbb nbg nbk nbn nbo nbu nga ngb ngg ngk ngn ngo ngu nka nkk nkn nko nku nna nnb nng nnk nnn nno nnu no- noa nob nog nok non noo nou nua nub nug nuk nun nuo nuu oaa oab oag oak oan oao oau ob- oba obb obg obk obn obo obu oga ogg ogn ogo oka okb okg okk oko oku on- ona onb ong onk onn ono onu oo- ooa oob oog ook oon ooo ou- oua ouk oun ouo ua- uaa uab uag uak uan uao uau uba ubb ubg ubk ubn ubo ubu uga ugb ugg ugk ugn ugo ugu uka ukb ukk ukn uku un- una unb ung unk unn uno unu uoa uob uog uok uon uoo uua uug uun uuu