a-a a-b aaa aab aad aak aam aau ab- aba abb abd abk abm abu ad- ada adb add adk adm adu aka akb akd akk akm aku ama amb amd amk amm amu au- aua aub aud auk aum b-u baa bab bad bak bam bau bba bbb bbd bbk bbm bbu bda bdb bdd bdk bdm bdu bka bkb bkk bkm bma bmb bmd bmk bmm bmu bua bub bud buk bum buu daa dab dad dak dam dau dba dbb dbd dbk dbm dbu dda ddb ddd ddk ddm ddu dka dkb dkk dkm dku dma dmb dmd dmk dmm dmu dua dub dud duk dum ka- kaa kab kad kak kam kau kba kbb kbd kbk kbm kbu kda kdb kdk kdm kdu kkb kkk kkm kku kma kmb kmd kmk kmm kmu kub kud kuk kum kuu maa mab mad mak mam mau mba mbb mbd mbk mbm mbu mda mdb mdd mdk mdm mdu mka mkb mkd mkk mkm mku mma mmb mmd mmk mmm mmu mua mub mud muk mum muu ua- uaa uab uad uak uam uau uba ubb ubk ubu uda udb udd udk udm udu uka ukb ukk uku um- uma umb umd umm umu uua uum uuu