lurid ulrid lruid rluid urlid rulid luird ulird liurd ilurd uilrd iulrd lriud rliud lirud ilrud rilud irlud urild ruild uirld iurld riuld iruld lurdi ulrdi lrudi rludi urldi ruldi ludri uldri lduri dluri udlri dulri lrdui rldui ldrui dlrui rdlui drlui urdli rudli udrli durli rduli druli luidr ulidr liudr iludr uildr iuldr ludir uldir lduir dluir udlir dulir lidur ildur ldiur dliur idlur dilur uidlr iudlr udilr duilr idulr diulr lridu rlidu lirdu ilrdu rildu irldu lrdiu rldiu ldriu dlriu rdliu drliu lidru ildru ldiru dliru idlru dilru ridlu irdlu rdilu drilu idrlu dirlu uridl ruidl uirdl iurdl riudl irudl urdil rudil udril duril rduil druil uidrl iudrl udirl duirl idurl diurl ridul irdul rdiul driul idrul dirul
Note: these 'words' (valid or invalid) are all the permutations of the word lurid. These words are obtained by scrambling the letters in lurid.