catch actch ctach tcach atcch tacch cacth accth ccath ccath accth cacth ctcah tccah cctah cctah tccah ctcah atcch tacch actch catch tcach ctach cathc acthc ctahc tcahc atchc tachc cahtc achtc chatc hcatc ahctc hactc cthac tchac chtac hctac thcac htcac athcc tahcc ahtcc hatcc thacc htacc cacht accht ccaht ccaht accht cacht cahct achct chact hcact ahcct hacct cchat cchat chcat hccat chcat hccat achct cahct ahcct hacct chact hcact ctcha tccha cctha cctha tccha ctcha cthca tchca chtca hctca thcca htcca cchta cchta chcta hccta chcta hccta tchca cthca thcca htcca chtca hctca atchc tachc acthc cathc tcahc ctahc athcc tahcc ahtcc hatcc thacc htacc achtc cahtc ahctc hactc chatc hcatc tchac cthac thcac htcac chtac hctac
Note: these 'words' (valid or invalid) are all the permutations of the word catch. These words are obtained by scrambling the letters in catch.