a-a aaa aaf aak aan aar af- afa aff afk afn afr aka akk akn akr an- ana anf ank ann anr ar- ara arf ark arn arr faa faf fak fan far ffa fff ffk ffn ffr fka fkf fkk fna fnf fnk fnn fnr fra frf frk frn frr ka- kaa kaf kak kan kar kfa kff kkk kkn kkr kn- kna knf knk knn knr kra krf krk krn krr naa naf nak nan nar nfa nff nfk nfn nfr nka nkf nkk nkn nkr nna nnf nnk nnn nra nrf nrk nrn nrr ra- raa raf rak ran rar rfa rff rfk rfn rfr rkf rkk rna rnn rnr rra rrf rrk rrn rrr