yirks iyrks yriks ryiks iryks riyks yikrs iykrs ykirs kyirs ikyrs kiyrs yrkis rykis ykris kyris rkyis kryis irkys rikys ikrys kirys rkiys kriys yirsk iyrsk yrisk ryisk irysk riysk yisrk iysrk ysirk syirk isyrk siyrk yrsik rysik ysrik syrik rsyik sryik irsyk risyk isryk siryk rsiyk sriyk yiksr iyksr ykisr kyisr ikysr kiysr yiskr iyskr ysikr syikr isykr siykr yksir kysir yskir sykir ksyir skyir iksyr kisyr iskyr sikyr ksiyr skiyr yrksi ryksi ykrsi kyrsi rkysi krysi yrski ryski ysrki syrki rsyki sryki yksri kysri yskri sykri ksyri skyri rksyi krsyi rskyi srkyi ksryi skryi irksy riksy ikrsy kirsy rkisy krisy irsky risky isrky sirky rsiky sriky iksry kisry iskry sikry ksiry skiry rksiy krsiy rskiy srkiy ksriy skriy
Note: these 'words' (valid or invalid) are all the permutations of the word yirks. These words are obtained by scrambling the letters in yirks.