a-a aaa aad aak aan aao aar ad- ada add adk adn ado adr aka akd akk akn ako akr an- ana and ank ann ano anr aoa aod aok aon aoo aor ar- ara ard ark arn aro arr daa dad dak dan dao dar dda ddd ddk ddn ddo ddr dka dkk dko dkr dna dnd dnk dnn dno dnr doa dod dok don doo dor dra drd drk drn dro drr ka- kaa kad kak kan kao kar kda kdk kdo kdr kkk kkn kkr kn- kna knd knk knn kno knr koa kod kok kon koo kor kra krd krk krn kro krr naa nad nak nan nao nar nda ndd ndk ndn ndo ndr nka nkk nkn nko nkr nna nnk nnn nno no- noa nod nok non noo nor nra nrd nrk nrn nro nrr oaa oad oak oan oao oar oda odd odn odo odr oka okd okk oko okr on- ona ond onk onn ono onr oo- ooa ood ook oon ooo oor or- ora ord ork orn oro orr ra- raa rad rak ran rao rar rda rdd rdn rdo rdr rkk rko rna rnd rnn rno rnr roa rod rok ron roo ror rra rrd rrk rrn rrr