edcca decca ecdca cedca dceca cdeca edcca decca ecdca cedca dceca cdeca eccda cecda eccda cecda cceda cceda dccea cdcea dccea cdcea ccdea ccdea edcac decac ecdac cedac dceac cdeac edacc deacc eadcc aedcc daecc adecc ecadc ceadc eacdc aecdc caedc acedc dcaec cdaec dacec adcec cadec acdec edcac decac ecdac cedac dceac cdeac edacc deacc eadcc aedcc daecc adecc ecadc ceadc eacdc aecdc caedc acedc dcaec cdaec dacec adcec cadec acdec eccad cecad eccad cecad ccead ccead ecacd ceacd eaccd aeccd caecd acecd ecacd ceacd eaccd aeccd caecd acecd ccaed ccaed caced acced caced acced dccae cdcae dccae cdcae ccdae ccdae dcace cdace dacce adcce cadce acdce dcace cdace dacce adcce cadce acdce ccade ccade cacde accde cacde accde
Note: these 'words' (valid or invalid) are all the permutations of the word edcca. These words are obtained by scrambling the letters in edcca.