a-a a-b aaa aab aad aah aao aau ab- aba abb abd abh abo abu ad- ada adb add adh ado adu aha ahb ahd ahh aho ahu aoa aob aod aoh aoo aou au- aua aub aud auh auo b-u baa bab bad bah bao bau bba bbb bbd bbh bbo bbu bda bdb bdd bdh bdo bdu bha bhb bhd bhh bho bhu boa bob bod boh boo bou bua bub bud buh buo buu daa dab dad dah dao dau dba dbb dbd dbh dbo dbu dda ddb ddd ddh ddo ddu dh- dha dhb dhd dhh dho dhu doa dob dod doh doo dou dua dub dud duh duo haa hab had hah hao hau hba hbb hbd hbh hbo hbu hda hdb hdd hdh hdo hdu hha hhb hhd hhh hho hhu hoa hob hod hoh hoo hou hua hub hud huh huo huu oaa oab oad oah oao oau ob- oba obb obd obh obo obu oda odb odd odh odo odu oha ohd ohh oho ohu oo- ooa oob ood ooh ooo ou- oua oud ouh ouo ua- uaa uab uad uah uao uau uba ubb ubh ubo ubu uda udb udd udo udu uha uhb uhd uhh uho uhu uoa uob uod uoo uua uuu