a-a a-b aaa aab aah aak aao aau ab- aba abb abh abk abo abu aha ahb ahh ahk aho ahu aka akb akh akk ako aku aoa aob aoh aok aoo aou au- aua aub auh auk auo b-u baa bab bah bak bao bau bba bbb bbh bbk bbo bbu bha bhb bhh bhk bho bhu bka bkb bkk bko boa bob boh bok boo bou bua bub buh buk buo buu haa hab hah hak hao hau hba hbb hbh hbk hbo hbu hha hhb hhh hhk hho hhu hka hkb hkh hkk hko hku hoa hob hoh hok hoo hou hua hub huh huk huo huu ka- kaa kab kah kak kao kau kba kbb kbh kbk kbo kbu kha khh khk kho khu kkb kkh kkk kku koa kob koh kok koo kou kub kuh kuk kuu oaa oab oah oak oao oau ob- oba obb obh obk obo obu oha ohh oho ohu oka okb okk oko oku oo- ooa oob ooh ook ooo ou- oua ouh ouk ouo ua- uaa uab uah uak uao uau uba ubb ubh ubk ubo ubu uha uhb uhh uho uhu uka ukb ukk uku uoa uob uok uoo uua uuu