a-a a-b aaa aab aad aah aak aau ab- aba abb abd abh abk abu ad- ada adb add adh adk adu aha ahb ahd ahh ahk ahu aka akb akd akh akk aku au- aua aub aud auh auk b-u baa bab bad bah bak bau bba bbb bbd bbh bbk bbu bda bdb bdd bdh bdk bdu bha bhb bhd bhh bhk bhu bka bkb bkk bua bub bud buh buk buu daa dab dad dah dak dau dba dbb dbd dbh dbk dbu dda ddb ddd ddh ddk ddu dh- dha dhb dhd dhh dhk dhu dka dkb dkk dku dua dub dud duh duk haa hab had hah hak hau hba hbb hbd hbh hbk hbu hda hdb hdd hdh hdk hdu hha hhb hhd hhh hhk hhu hka hkb hkd hkh hkk hku hua hub hud huh huk huu ka- kaa kab kad kah kak kau kba kbb kbd kbh kbk kbu kda kdb kdh kdk kdu kha khh khk khu kkb kkh kkk kku kub kud kuh kuk kuu ua- uaa uab uad uah uak uau uba ubb ubh ubk ubu uda udb udd udk udu uha uhb uhd uhh uhu uka ukb ukk uku uua uuu