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