yiked iyked ykied kyied ikyed kiyed yiekd iyekd yeikd eyikd ieykd eiykd ykeid kyeid yekid eykid keyid ekyid ikeyd kieyd iekyd eikyd keiyd ekiyd yikde iykde ykide kyide ikyde kiyde yidke iydke ydike dyike idyke diyke ykdie kydie ydkie dykie kdyie dkyie ikdye kidye idkye dikye kdiye dkiye yiedk iyedk yeidk eyidk ieydk eiydk yidek iydek ydiek dyiek idyek diyek yedik eydik ydeik dyeik edyik deyik iedyk eidyk ideyk dieyk ediyk deiyk ykedi kyedi yekdi eykdi keydi ekydi ykdei kydei ydkei dykei kdyei dkyei yedki eydki ydeki dyeki edyki deyki kedyi ekdyi kdeyi dkeyi edkyi dekyi ikedy kiedy iekdy eikdy keidy ekidy ikdey kidey idkey dikey kdiey dkiey iedky eidky ideky dieky ediky deiky kediy ekdiy kdeiy dkeiy edkiy dekiy
Note: these 'words' (valid or invalid) are all the permutations of the word yiked. These words are obtained by scrambling the letters in yiked.