fyrds yfrds fryds rfyds yrfds ryfds fydrs yfdrs fdyrs dfyrs ydfrs dyfrs frdys rfdys fdrys dfrys rdfys drfys yrdfs rydfs ydrfs dyrfs rdyfs dryfs fyrsd yfrsd frysd rfysd yrfsd ryfsd fysrd yfsrd fsyrd sfyrd ysfrd syfrd frsyd rfsyd fsryd sfryd rsfyd srfyd yrsfd rysfd ysrfd syrfd rsyfd sryfd fydsr yfdsr fdysr dfysr ydfsr dyfsr fysdr yfsdr fsydr sfydr ysfdr syfdr fdsyr dfsyr fsdyr sfdyr dsfyr sdfyr ydsfr dysfr ysdfr sydfr dsyfr sdyfr frdsy rfdsy fdrsy dfrsy rdfsy drfsy frsdy rfsdy fsrdy sfrdy rsfdy srfdy fdsry dfsry fsdry sfdry dsfry sdfry rdsfy drsfy rsdfy srdfy dsrfy sdrfy yrdsf rydsf ydrsf dyrsf rdysf drysf yrsdf rysdf ysrdf syrdf rsydf srydf ydsrf dysrf ysdrf sydrf dsyrf sdyrf rdsyf drsyf rsdyf srdyf dsryf sdryf
Note: these 'words' (valid or invalid) are all the permutations of the word fyrds. These words are obtained by scrambling the letters in fyrds.