cceis cceis cecis eccis cecis eccis ccies ccies cices icces cices icces ceics ecics ciecs icecs eiccs ieccs ceics ecics ciecs icecs eiccs ieccs ccesi ccesi cecsi eccsi cecsi eccsi ccsei ccsei cscei sccei cscei sccei cesci ecsci cseci sceci escci secci cesci ecsci cseci sceci escci secci ccise ccise cicse iccse cicse iccse ccsie ccsie cscie sccie cscie sccie cisce icsce csice scice iscce sicce cisce icsce csice scice iscce sicce ceisc ecisc ciesc icesc eicsc iecsc cesic ecsic cseic sceic escic secic cisec icsec csiec sciec iscec sicec eiscc iescc esicc seicc isecc siecc ceisc ecisc ciesc icesc eicsc iecsc cesic ecsic cseic sceic escic secic cisec icsec csiec sciec iscec sicec eiscc iescc esicc seicc isecc siecc
Note: these 'words' (valid or invalid) are all the permutations of the word cceis. These words are obtained by scrambling the letters in cceis.