ureas rueas ueras euras reuas eruas uraes ruaes uares aures raues arues uears euars uaers auers eaurs aeurs reaus eraus raeus areus earus aerus uresa ruesa uersa eursa reusa erusa ursea rusea usrea surea rsuea sruea uesra eusra usera suera esura seura resua ersua rseua sreua esrua serua urase ruase uarse aurse rause aruse ursae rusae usrae surae rsuae sruae uasre ausre usare suare asure saure rasue arsue rsaue sraue asrue sarue ueasr euasr uaesr auesr eausr aeusr uesar eusar usear suear esuar seuar uaser auser usaer suaer asuer sauer easur aesur esaur seaur aseur saeur reasu erasu raesu aresu earsu aersu resau ersau rseau sreau esrau serau raseu arseu rsaeu sraeu asreu sareu easru aesru esaru searu aseru saeru
Note: these 'words' (valid or invalid) are all the permutations of the word ureas. These words are obtained by scrambling the letters in ureas.