cleck lceck celck eclck lecck elcck clcek lccek cclek cclek lccek clcek ceclk ecclk ccelk ccelk ecclk ceclk lecck elcck lceck cleck eclck celck clekc lcekc celkc eclkc leckc elckc clkec lckec cklec kclec lkcec klcec ceklc ecklc ckelc kcelc ekclc keclc lekcc elkcc lkecc klecc eklcc kelcc clcke lccke cclke cclke lccke clcke clkce lckce cklce kclce lkcce klcce cckle cckle ckcle kccle ckcle kccle lckce clkce lkcce klcce cklce kclce ceckl ecckl ccekl ccekl ecckl ceckl cekcl eckcl ckecl kcecl ekccl keccl cckel cckel ckcel kccel ckcel kccel eckcl cekcl ekccl keccl ckecl kcecl leckc elckc lcekc clekc eclkc celkc lekcc elkcc lkecc klecc eklcc kelcc lckec clkec lkcec klcec cklec kclec ecklc ceklc ekclc keclc ckelc kcelc
Note: these 'words' (valid or invalid) are all the permutations of the word cleck. These words are obtained by scrambling the letters in cleck.