snigs nsigs sings isngs nisgs insgs sngis nsgis sgnis gsnis ngsis gnsis signs isgns sgins gsins igsns gisns nigss ingss ngiss gniss ignss ginss snisg nsisg sinsg isnsg nissg inssg snsig nssig ssnig ssnig nssig snsig sisng issng ssing ssing issng sisng nissg inssg nsisg snisg isnsg sinsg sngsi nsgsi sgnsi gsnsi ngssi gnssi snsgi nssgi ssngi ssngi nssgi snsgi sgsni gssni ssgni ssgni gssni sgsni ngssi gnssi nsgsi sngsi gsnsi sgnsi sigsn isgsn sgisn gsisn igssn gissn sisgn issgn ssign ssign issgn sisgn sgsin gssin ssgin ssgin gssin sgsin igssn gissn isgsn sigsn gsisn sgisn nigss ingss ngiss gniss ignss ginss nisgs insgs nsigs snigs isngs sings ngsis gnsis nsgis sngis gsnis sgnis igsns gisns isgns signs gsins sgins
Note: these 'words' (valid or invalid) are all the permutations of the word snigs. These words are obtained by scrambling the letters in snigs.