leech elech leech elech eelch eelch leceh elceh lceeh cleeh ecleh celeh leceh elceh lceeh cleeh ecleh celeh eeclh eeclh ecelh ceelh ecelh ceelh leehc elehc leehc elehc eelhc eelhc lehec elhec lheec hleec ehlec helec lehec elhec lheec hleec ehlec helec eehlc eehlc ehelc heelc ehelc heelc leche elche lcehe clehe eclhe celhe lehce elhce lhece hlece ehlce helce lchee clhee lhcee hlcee chlee hclee echle cehle ehcle hecle chele hcele leche elche lcehe clehe eclhe celhe lehce elhce lhece hlece ehlce helce lchee clhee lhcee hlcee chlee hclee echle cehle ehcle hecle chele hcele eechl eechl ecehl ceehl ecehl ceehl eehcl eehcl ehecl heecl ehecl heecl echel cehel ehcel hecel cheel hceel echel cehel ehcel hecel cheel hceel
Note: these 'words' (valid or invalid) are all the permutations of the word leech. These words are obtained by scrambling the letters in leech.