ingus nigus ignus ginus ngius gnius inugs niugs iungs uings nuigs unigs iguns giuns iugns uigns guins ugins nguis gnuis nugis ungis gunis ugnis ingsu nigsu ignsu ginsu ngisu gnisu insgu nisgu isngu singu nsigu snigu igsnu gisnu isgnu signu gsinu sginu ngsiu gnsiu nsgiu sngiu gsniu sgniu inusg niusg iunsg uinsg nuisg unisg insug nisug isnug sinug nsiug sniug iusng uisng isung siung using suing nusig unsig nsuig snuig usnig sunig igusn giusn iugsn uigsn guisn ugisn igsun gisun isgun sigun gsiun sgiun iusgn uisgn isugn siugn usign suign gusin ugsin gsuin sguin usgin sugin ngusi gnusi nugsi ungsi gunsi ugnsi ngsui gnsui nsgui sngui gsnui sgnui nusgi unsgi nsugi snugi usngi sungi gusni ugsni gsuni sguni usgni sugni
Note: these 'words' (valid or invalid) are all the permutations of the word ingus. These words are obtained by scrambling the letters in ingus.