quais uqais qauis aquis uaqis auqis quias uqias qiuas iquas uiqas iuqas qaius aqius qiaus iqaus aiqus iaqus uaiqs auiqs uiaqs iuaqs aiuqs iauqs quasi uqasi qausi aqusi uaqsi auqsi qusai uqsai qsuai squai usqai suqai qasui aqsui qsaui sqaui asqui saqui uasqi ausqi usaqi suaqi asuqi sauqi quisa uqisa qiusa iqusa uiqsa iuqsa qusia uqsia qsuia squia usqia suqia qisua iqsua qsiua sqiua isqua siqua uisqa iusqa usiqa suiqa isuqa siuqa qaisu aqisu qiasu iqasu aiqsu iaqsu qasiu aqsiu qsaiu sqaiu asqiu saqiu qisau iqsau qsiau sqiau isqau siqau aisqu iasqu asiqu saiqu isaqu siaqu uaisq auisq uiasq iuasq aiusq iausq uasiq ausiq usaiq suaiq asuiq sauiq uisaq iusaq usiaq suiaq isuaq siuaq aisuq iasuq asiuq saiuq isauq siauq
Note: these 'words' (valid or invalid) are all the permutations of the word quais. These words are obtained by scrambling the letters in quais.