a-a a-b aaa aab aad aah aau ab- aba abb abd abh abu ad- ada adb add adh adu aha ahb ahd ahh ahu au- aua aub aud auh b-u baa bab bad bah bau bba bbb bbd bbh bbu bda bdb bdd bdh bdu bha bhb bhd bhh bhu bua bub bud buh buu daa dab dad dah dau dba dbb dbd dbh dbu dda ddb ddd ddh ddu dh- dha dhb dhd dhh dhu dua dub dud duh haa hab had hah hau hba hbb hbd hbh hbu hda hdb hdd hdh hdu hha hhb hhd hhh hhu hua hub hud huh huu ua- uaa uab uad uah uau uba ubb ubh ubu uda udb udd udu uha uhb uhd uhh uhu uua uuu