a-a a-z aaa aaf aak aan aar aaz af- afa aff afk afn afr afz aka akk akn akr an- ana anf ank ann anr anz ar- ara arf ark arn arr arz az- aza azf azn azz faa faf fak fan far faz ffa fff ffk ffn ffr ffz fka fkf fkk fna fnf fnk fnn fnr fnz fra frf frk frn frr k-z ka- kaa kaf kak kan kar kaz kfa kff kkk kkn kkr kn- kna knf knk knn knr kra krf krk krn krr naa naf nak nan nar naz nfa nff nfk nfn nfr nka nkf nkk nkn nkr nna nnf nnk nnn nnz nra nrf nrk nrn nrr nrz nzf nzz ra- raa raf rak ran rar raz rfa rff rfk rfn rfr rfz rkf rkk rkz rna rnn rnr rnz rra rrf rrk rrn rrr rza zaa zaf zak zan zar zaz zfa zfn zfr zka znn zzr zzz