a-a aaa aaf aan aar aaw af- afa aff afn afr afw an- ana anf ann anr ar- ara arf arn arr arw aw- awa awf awn awr aww faa faf fan far faw ffa fff ffn ffr ffw fna fnf fnn fnr fnw fra frf frn frr frw fwa fwf fwn naa naf nan nar naw nfa nff nfn nfr nna nnf nnn nnw nra nrf nrn nrr nrw nwa nwf nwn nwr ra- raa raf ran rar raw rfa rff rfn rfr rfw rna rnn rnr rnw rra rrf rrn rrr rwa rwf rwr waa waf wan war waw wfa wff wfn wfr wfw wn- wna wnf wnn wnw wr- wra wrf wrn wrr wrw wwa wwf wwn www