quaff uqaff qauff aquff uaqff auqff qufaf uqfaf qfuaf fquaf ufqaf fuqaf qafuf aqfuf qfauf fqauf afquf faquf uafqf aufqf ufaqf fuaqf afuqf fauqf quaff uqaff qauff aquff uaqff auqff qufaf uqfaf qfuaf fquaf ufqaf fuqaf qafuf aqfuf qfauf fqauf afquf faquf uafqf aufqf ufaqf fuaqf afuqf fauqf quffa uqffa qfufa fqufa ufqfa fuqfa quffa uqffa qfufa fqufa ufqfa fuqfa qffua fqfua qffua fqfua ffqua ffqua uffqa fufqa uffqa fufqa ffuqa ffuqa qaffu aqffu qfafu fqafu afqfu faqfu qaffu aqffu qfafu fqafu afqfu faqfu qffau fqfau qffau fqfau ffqau ffqau affqu fafqu affqu fafqu ffaqu ffaqu uaffq auffq ufafq fuafq afufq faufq uaffq auffq ufafq fuafq afufq faufq uffaq fufaq uffaq fufaq ffuaq ffuaq affuq fafuq affuq fafuq ffauq ffauq
Note: these 'words' (valid or invalid) are all the permutations of the word quaff. These words are obtained by scrambling the letters in quaff.