eccha cecha eccha cecha cceha cceha echca cehca ehcca hecca checa hceca echca cehca ehcca hecca checa hceca cchea cchea chcea hccea chcea hccea eccah cecah eccah cecah cceah cceah ecach ceach eacch aecch caech acech ecach ceach eacch aecch caech acech ccaeh ccaeh caceh acceh caceh acceh echac cehac ehcac hecac cheac hceac ecahc ceahc eachc aechc caehc acehc ehacc heacc eahcc aehcc haecc ahecc chaec hcaec cahec achec hacec ahcec echac cehac ehcac hecac cheac hceac ecahc ceahc eachc aechc caehc acehc ehacc heacc eahcc aehcc haecc ahecc chaec hcaec cahec achec hacec ahcec cchae cchae chcae hccae chcae hccae ccahe ccahe cache acche cache acche chace hcace cahce achce hacce ahcce chace hcace cahce achce hacce ahcce
Note: these 'words' (valid or invalid) are all the permutations of the word eccha. These words are obtained by scrambling the letters in eccha.