craef rcaef caref acref racef arcef creaf rceaf ceraf ecraf recaf ercaf caerf acerf cearf ecarf aecrf eacrf raecf arecf reacf eracf aercf earcf crafe rcafe carfe acrfe racfe arcfe crfae rcfae cfrae fcrae rfcae frcae cafre acfre cfare fcare afcre facre rafce arfce rface frace afrce farce crefa rcefa cerfa ecrfa recfa ercfa crfea rcfea cfrea fcrea rfcea frcea cefra ecfra cfera fcera efcra fecra refca erfca rfeca freca efrca ferca caefr acefr ceafr ecafr aecfr eacfr cafer acfer cfaer fcaer afcer facer cefar ecfar cfear fcear efcar fecar aefcr eafcr afecr faecr efacr feacr raefc arefc reafc erafc aerfc earfc rafec arfec rfaec fraec afrec farec refac erfac rfeac freac efrac ferac aefrc eafrc aferc faerc efarc fearc
Note: these 'words' (valid or invalid) are all the permutations of the word craef. These words are obtained by scrambling the letters in craef.