brugh rbugh burgh ubrgh rubgh urbgh brguh rbguh bgruh gbruh rgbuh grbuh bugrh ubgrh bgurh gburh ugbrh gubrh rugbh urgbh rgubh grubh ugrbh gurbh bruhg rbuhg burhg ubrhg rubhg urbhg brhug rbhug bhrug hbrug rhbug hrbug buhrg ubhrg bhurg hburg uhbrg hubrg ruhbg urhbg rhubg hrubg uhrbg hurbg brghu rbghu bgrhu gbrhu rgbhu grbhu brhgu rbhgu bhrgu hbrgu rhbgu hrbgu bghru gbhru bhgru hbgru ghbru hgbru rghbu grhbu rhgbu hrgbu ghrbu hgrbu bughr ubghr bguhr gbuhr ugbhr gubhr buhgr ubhgr bhugr hbugr uhbgr hubgr bghur gbhur bhgur hbgur ghbur hgbur ughbr guhbr uhgbr hugbr ghubr hgubr rughb urghb rguhb gruhb ugrhb gurhb ruhgb urhgb rhugb hrugb uhrgb hurgb rghub grhub rhgub hrgub ghrub hgrub ughrb guhrb uhgrb hugrb ghurb hgurb
Note: these 'words' (valid or invalid) are all the permutations of the word brugh. These words are obtained by scrambling the letters in brugh.