a-a aaa aaf aan aas aaw af- afa aff afn afs afw an- ana anf ann ans as- asa asf asn ass asw aw- awa awf awn aws aww faa faf fan fas faw ffa fff ffn ffs ffw fna fnf fnn fns fnw fsa fsf fsn fss fsw fwa fwf fwn fws naa naf nan nas naw nfa nff nfn nfs nna nnf nnn nns nnw nsa nsf nsn nss nsw nwa nwf nwn nws saa saf san sas saw sfa sff sfn sfs sfw sna snf snn sns snw ss- ssa ssf ssn sss ssw swa swf swn sws waa waf wan was waw wfa wff wfn wfs wfw wn- wna wnf wnn wns wnw wsa wsf wsn wss wsw wwa wwf wwn www