a-a aaa aad aah aan aao ad- ada add adh adn ado aha ahd ahh ahn aho an- ana and anh ann ano aoa aod aoh aon aoo daa dad dah dan dao dda ddd ddh ddn ddo dh- dha dhd dhh dho dna dnd dnh dnn dno doa dod doh don doo haa had hah han hao hda hdd hdh hdn hdo hha hhd hhh hhn hho hna hnd hnh hnn hno hoa hod hoh hon hoo naa nad nah nan nao nda ndd ndh ndn ndo nha nhd nhh nhn nna nnh nnn nno no- noa nod noh non noo oaa oad oah oan oao oda odd odh odn odo oha ohd ohh ohn oho on- ona ond onh onn ono oo- ooa ood ooh oon ooo