clecu lcecu celcu eclcu leccu elccu clceu lcceu ccleu ccleu lcceu clceu ceclu ecclu ccelu ccelu ecclu ceclu leccu elccu lcecu clecu eclcu celcu cleuc lceuc celuc ecluc lecuc elcuc cluec lcuec culec uclec lucec ulcec ceulc eculc cuelc ucelc euclc ueclc leucc elucc luecc ulecc eulcc uelcc clcue lccue cclue cclue lccue clcue cluce lcuce culce uclce lucce ulcce ccule ccule cucle uccle cucle uccle lcuce cluce lucce ulcce culce uclce cecul eccul cceul cceul eccul cecul ceucl ecucl cuecl ucecl euccl ueccl ccuel ccuel cucel uccel cucel uccel ecucl ceucl euccl ueccl cuecl ucecl lecuc elcuc lceuc cleuc ecluc celuc leucc elucc luecc ulecc eulcc uelcc lcuec cluec lucec ulcec culec uclec eculc ceulc euclc ueclc cuelc ucelc
Note: these 'words' (valid or invalid) are all the permutations of the word clecu. These words are obtained by scrambling the letters in clecu.