yuked uyked ykued kyued ukyed kuyed yuekd uyekd yeukd eyukd ueykd euykd ykeud kyeud yekud eykud keyud ekyud ukeyd kueyd uekyd eukyd keuyd ekuyd yukde uykde ykude kyude ukyde kuyde yudke uydke yduke dyuke udyke duyke ykdue kydue ydkue dykue kdyue dkyue ukdye kudye udkye dukye kduye dkuye yuedk uyedk yeudk eyudk ueydk euydk yudek uydek yduek dyuek udyek duyek yeduk eyduk ydeuk dyeuk edyuk deyuk uedyk eudyk udeyk dueyk eduyk deuyk ykedu kyedu yekdu eykdu keydu ekydu ykdeu kydeu ydkeu dykeu kdyeu dkyeu yedku eydku ydeku dyeku edyku deyku kedyu ekdyu kdeyu dkeyu edkyu dekyu ukedy kuedy uekdy eukdy keudy ekudy ukdey kudey udkey dukey kduey dkuey uedky eudky udeky dueky eduky deuky keduy ekduy kdeuy dkeuy edkuy dekuy
Note: these 'words' (valid or invalid) are all the permutations of the word yuked. These words are obtained by scrambling the letters in yuked.