yecch eycch ycech cyech ecych ceych yecch eycch ycech cyech ecych ceych ycceh cyceh ycceh cyceh ccyeh ccyeh eccyh cecyh eccyh cecyh cceyh cceyh yechc eychc ycehc cyehc ecyhc ceyhc yehcc eyhcc yhecc hyecc ehycc heycc ychec cyhec yhcec hycec chyec hcyec echyc cehyc ehcyc hecyc cheyc hceyc yechc eychc ycehc cyehc ecyhc ceyhc yehcc eyhcc yhecc hyecc ehycc heycc ychec cyhec yhcec hycec chyec hcyec echyc cehyc ehcyc hecyc cheyc hceyc ycche cyche ycche cyche ccyhe ccyhe ychce cyhce yhcce hycce chyce hcyce ychce cyhce yhcce hycce chyce hcyce cchye cchye chcye hccye chcye hccye ecchy cechy ecchy cechy ccehy ccehy echcy cehcy ehccy heccy checy hcecy echcy cehcy ehccy heccy checy hcecy cchey cchey chcey hccey chcey hccey
Note: these 'words' (valid or invalid) are all the permutations of the word yecch. These words are obtained by scrambling the letters in yecch.