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