euccs ueccs ecucs ceucs ucecs cuecs euccs ueccs ecucs ceucs ucecs cuecs eccus cecus eccus cecus cceus cceus ucces cuces ucces cuces ccues ccues eucsc uecsc ecusc ceusc ucesc cuesc euscc uescc esucc seucc usecc suecc ecsuc cesuc escuc secuc cseuc sceuc ucsec cusec uscec sucec csuec scuec eucsc uecsc ecusc ceusc ucesc cuesc euscc uescc esucc seucc usecc suecc ecsuc cesuc escuc secuc cseuc sceuc ucsec cusec uscec sucec csuec scuec eccsu cecsu eccsu cecsu ccesu ccesu ecscu cescu esccu seccu csecu scecu ecscu cescu esccu seccu csecu scecu ccseu ccseu csceu scceu csceu scceu uccse cucse uccse cucse ccuse ccuse ucsce cusce uscce succe csuce scuce ucsce cusce uscce succe csuce scuce ccsue ccsue cscue sccue cscue sccue
Note: these 'words' (valid or invalid) are all the permutations of the word euccs. These words are obtained by scrambling the letters in euccs.