quirk uqirk qiurk iqurk uiqrk iuqrk qurik uqrik qruik rquik urqik ruqik qiruk iqruk qriuk rqiuk irquk riquk uirqk iurqk uriqk ruiqk iruqk riuqk quikr uqikr qiukr iqukr uiqkr iuqkr qukir uqkir qkuir kquir ukqir kuqir qikur iqkur qkiur kqiur ikqur kiqur uikqr iukqr ukiqr kuiqr ikuqr kiuqr qurki uqrki qruki rquki urqki ruqki qukri uqkri qkuri kquri ukqri kuqri qrkui rqkui qkrui kqrui rkqui krqui urkqi rukqi ukrqi kurqi rkuqi kruqi qirku iqrku qriku rqiku irqku riqku qikru iqkru qkiru kqiru ikqru kiqru qrkiu rqkiu qkriu kqriu rkqiu krqiu irkqu rikqu ikrqu kirqu rkiqu kriqu uirkq iurkq urikq ruikq irukq riukq uikrq iukrq ukirq kuirq ikurq kiurq urkiq rukiq ukriq kuriq rkuiq kruiq irkuq rikuq ikruq kiruq rkiuq kriuq
Note: these 'words' (valid or invalid) are all the permutations of the word quirk. These words are obtained by scrambling the letters in quirk.