vierr iverr veirr evirr ievrr eivrr virer ivrer vrier rvier irver river verir evrir vreir rveir ervir revir iervr eirvr irevr rievr erivr reivr vierr iverr veirr evirr ievrr eivrr virer ivrer vrier rvier irver river verir evrir vreir rveir ervir revir iervr eirvr irevr rievr erivr reivr virre ivrre vrire rvire irvre rivre virre ivrre vrire rvire irvre rivre vrrie rvrie vrrie rvrie rrvie rrvie irrve rirve irrve rirve rrive rrive verri evrri vreri rveri ervri revri verri evrri vreri rveri ervri revri vrrei rvrei vrrei rvrei rrvei rrvei errvi rervi errvi rervi rrevi rrevi ierrv eirrv irerv rierv erirv reirv ierrv eirrv irerv rierv erirv reirv irrev rirev irrev rirev rriev rriev erriv reriv erriv reriv rreiv rreiv
Note: these 'words' (valid or invalid) are all the permutations of the word vierr. These words are obtained by scrambling the letters in vierr.