a-a a-b aaa aab aak aam aao aau ab- aba abb abk abm abo abu aka akb akk akm ako aku ama amb amk amm amo amu aoa aob aok aom aoo aou au- aua aub auk aum auo b-u baa bab bak bam bao bau bba bbb bbk bbm bbo bbu bka bkb bkk bkm bko bma bmb bmk bmm bmo bmu boa bob bok bom boo bou bua bub buk bum buo buu ka- kaa kab kak kam kao kau kba kbb kbk kbm kbo kbu kkb kkk kkm kku kma kmb kmk kmm kmo kmu koa kob kok kom koo kou kub kuk kum kuu m-o maa mab mak mam mao mau mba mbb mbk mbm mbo mbu mka mkb mkk mkm mko mku mma mmb mmk mmm mmo mmu moa mob mok mom moo mou mua mub muk mum muu oaa oab oak oam oao oau ob- oba obb obk obm obo obu oka okb okk oko oku om- oma omb omm omo omu oo- ooa oob ook oom ooo ou- oua ouk oum ouo ua- uaa uab uak uam uao uau uba ubb ubk ubo ubu uka ukb ukk uku um- uma umb umm umo umu uoa uob uok uom uoo uua uum uuu