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