a-a a-b aaa aab aak aam aau ab- aba abb abk abm abu aka akb akk akm aku ama amb amk amm amu au- aua aub auk aum b-u baa bab bak bam bau bba bbb bbk bbm bbu bka bkb bkk bkm bma bmb bmk bmm bmu bua bub buk bum buu ka- kaa kab kak kam kau kba kbb kbk kbm kbu kkb kkk kkm kku kma kmb kmk kmm kmu kub kuk kum kuu maa mab mak mam mau mba mbb mbk mbm mbu mka mkb mkk mkm mku mma mmb mmk mmm mmu mua mub muk mum muu ua- uaa uab uak uam uau uba ubb ubk ubu uka ukb ukk uku um- uma umb umm umu uua uum uuu