a-a a-b aaa aab aag aah aak aau ab- aba abb abg abh abk abu ag- aga agb agg agh agk agu aha ahb ahg ahh ahk ahu aka akb akg akh akk aku au- aua aub aug auh auk b-u baa bab bag bah bak bau bba bbb bbg bbh bbk bbu bga bgb bgg bgh bgk bgu bha bhb bhg bhh bhk bhu bka bkb bkg bkk bua bub bug buh buk buu gaa gab gag gah gak gau gba gbg gbh gbk gbu gga ggb ggg ggh ggu gha ghb ghg ghh gka gkb gkh gu- gua gub gug guk guu haa hab hag hah hak hau hba hbb hbg hbh hbk hbu hga hgb hgg hgh hgk hgu hha hhb hhg hhh hhk hhu hka hkb hkg hkh hkk hku hua hub hug huh huk huu ka- kaa kab kag kah kak kau kba kbb kbh kbk kbu kga kgb kgh kgu kha khh khk khu kkb kkh kkk kku kub kug kuh kuk kuu ua- uaa uab uag uah uak uau uba ubb ubg ubh ubk ubu uga ugb ugg ugh ugk ugu uha uhb uhh uhu uka ukb ukk uku uua uug uuu