eyrir yerir eryir reyir yreir ryeir eyirr yeirr eiyrr ieyrr yierr iyerr eriyr reiyr eiryr ieryr rieyr ireyr yrier ryier yirer iyrer riyer iryer eyrri yerri eryri reyri yreri ryeri eyrri yerri eryri reyri yreri ryeri erryi reryi erryi reryi rreyi rreyi yrrei ryrei yrrei ryrei rryei rryei eyirr yeirr eiyrr ieyrr yierr iyerr eyrir yerir eryir reyir yreir ryeir eiryr ieryr eriyr reiyr ireyr rieyr yirer iyrer yrier ryier iryer riyer eriry reiry eirry ierry riery irery erriy reriy erriy reriy rreiy rreiy eirry ierry eriry reiry irery riery rirey irrey rriey rriey irrey rirey yrire ryire yirre iyrre riyre iryre yrrie ryrie yrrie ryrie rryie rryie yirre iyrre yrire ryire iryre riyre rirye irrye rriye rriye irrye rirye
Note: these 'words' (valid or invalid) are all the permutations of the word eyrir. These words are obtained by scrambling the letters in eyrir.