quoad uqoad qouad oquad uoqad ouqad quaod uqaod qauod aquod uaqod auqod qoaud oqaud qaoud aqoud oaqud aoqud uoaqd ouaqd uaoqd auoqd oauqd aouqd quoda uqoda qouda oquda uoqda ouqda qudoa uqdoa qduoa dquoa udqoa duqoa qodua oqdua qdoua dqoua odqua doqua uodqa oudqa udoqa duoqa oduqa douqa quado uqado qaudo aqudo uaqdo auqdo qudao uqdao qduao dquao udqao duqao qaduo aqduo qdauo dqauo adquo daquo uadqo audqo udaqo duaqo aduqo dauqo qoadu oqadu qaodu aqodu oaqdu aoqdu qodau oqdau qdoau dqoau odqau doqau qadou aqdou qdaou dqaou adqou daqou oadqu aodqu odaqu doaqu adoqu daoqu uoadq ouadq uaodq auodq oaudq aoudq uodaq oudaq udoaq duoaq oduaq douaq uadoq audoq udaoq duaoq aduoq dauoq oaduq aoduq odauq doauq adouq daouq
Note: these 'words' (valid or invalid) are all the permutations of the word quoad. These words are obtained by scrambling the letters in quoad.