a-a aaa aad aak aao aar ad- ada add adk ado adr aka akd akk ako akr aoa aod aok aoo aor ar- ara ard ark aro arr daa dad dak dao dar dda ddd ddk ddo ddr dka dkk dko dkr doa dod dok doo dor dra drd drk dro drr ka- kaa kad kak kao kar kda kdk kdo kdr kkk kkr koa kod kok koo kor kra krd krk kro krr oaa oad oak oao oar oda odd odo odr oka okd okk oko okr oo- ooa ood ook ooo oor or- ora ord ork oro orr ra- raa rad rak rao rar rda rdd rdo rdr rkk rko roa rod rok roo ror rra rrd rrk rrr