grfoh rgfoh gfroh fgroh rfgoh frgoh grofh rgofh gorfh ogrfh rogfh orgfh gforh fgorh gofrh ogfrh fogrh ofgrh rfogh frogh rofgh orfgh forgh ofrgh grfho rgfho gfrho fgrho rfgho frgho grhfo rghfo ghrfo hgrfo rhgfo hrgfo gfhro fghro ghfro hgfro fhgro hfgro rfhgo frhgo rhfgo hrfgo fhrgo hfrgo grohf rgohf gorhf ogrhf roghf orghf grhof rghof ghrof hgrof rhgof hrgof gohrf oghrf ghorf hgorf ohgrf hogrf rohgf orhgf rhogf hrogf ohrgf horgf gfohr fgohr gofhr ogfhr foghr ofghr gfhor fghor ghfor hgfor fhgor hfgor gohfr oghfr ghofr hgofr ohgfr hogfr fohgr ofhgr fhogr hfogr ohfgr hofgr rfohg frohg rofhg orfhg forhg ofrhg rfhog frhog rhfog hrfog fhrog hfrog rohfg orhfg rhofg hrofg ohrfg horfg fohrg ofhrg fhorg hforg ohfrg hofrg
Note: these 'words' (valid or invalid) are all the permutations of the word grfoh. These words are obtained by scrambling the letters in grfoh.