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