a-a a-c aaa aac aad aah aan aao ac- aca acc acd ach acn aco ad- ada adc add adh adn ado aha ahc ahd ahh ahn aho an- ana anc and anh ann ano aoa aoc aod aoh aon aoo c-- caa cac cad cah can cao cca ccc ccd cch ccn cco cda cdc cdd cdh cdn cdo ch- cha chc chd chh chn cho cn- cna cnc cnd cnh cnn cno co- coa coc cod coh con coo daa dac dad dah dan dao dca dcc dcd dcn dco dda ddc ddd ddh ddn ddo dh- dha dhc dhd dhh dho dna dnc dnd dnh dnn dno doa doc dod doh don doo haa hac had hah han hao hca hcc hcd hch hcn hco hda hdc hdd hdh hdn hdo hha hhc hhd hhh hhn hho hna hnc hnd hnh hnn hno hoa hoc hod hoh hon hoo naa nac nad nah nan nao nca ncc ncd nch ncn nco nda ndc ndd ndh ndn ndo nha nhc nhd nhh nhn nna nnc nnh nnn nno no- noa noc nod noh non noo oaa oac oad oah oan oao oc- oca occ ocd och ocn oco oda odc odd odh odn odo oha ohc ohd ohh ohn oho on- ona onc ond onh onn ono oo- ooa ooc ood ooh oon ooo