grout rgout gorut ogrut rogut orgut gruot rguot gurot ugrot rugot urgot gourt ogurt guort ugort ougrt uogrt rougt orugt ruogt urogt ourgt uorgt grotu rgotu gortu ogrtu rogtu orgtu grtou rgtou gtrou tgrou rtgou trgou gotru ogtru gtoru tgoru otgru togru rotgu ortgu rtogu trogu otrgu torgu gruto rguto gurto ugrto rugto urgto grtuo rgtuo gtruo tgruo rtguo trguo gutro ugtro gturo tguro utgro tugro rutgo urtgo rtugo trugo utrgo turgo goutr ogutr guotr ugotr ougtr uogtr gotur ogtur gtour tgour otgur togur gutor ugtor gtuor tguor utgor tugor outgr uotgr otugr tougr utogr tuogr routg orutg ruotg urotg ourtg uortg rotug ortug rtoug troug otrug torug rutog urtog rtuog truog utrog turog outrg uotrg oturg tourg utorg tuorg
Note: these 'words' (valid or invalid) are all the permutations of the word grout. These words are obtained by scrambling the letters in grout.