fireg ifreg frieg rfieg irfeg rifeg fierg iferg feirg efirg iefrg eifrg freig rfeig ferig efrig refig erfig irefg riefg ierfg eirfg reifg erifg firge ifrge frige rfige irfge rifge figre ifgre fgire gfire igfre gifre frgie rfgie fgrie gfrie rgfie grfie irgfe rigfe igrfe girfe rgife grife fiegr ifegr feigr efigr iefgr eifgr figer ifger fgier gfier igfer gifer fegir efgir fgeir gfeir egfir gefir iegfr eigfr igefr giefr egifr geifr fregi rfegi fergi efrgi refgi erfgi frgei rfgei fgrei gfrei rgfei grfei fegri efgri fgeri gferi egfri gefri regfi ergfi rgefi grefi egrfi gerfi iregf riegf iergf eirgf reigf erigf irgef rigef igref giref rgief grief iegrf eigrf igerf gierf egirf geirf regif ergif rgeif greif egrif gerif
Note: these 'words' (valid or invalid) are all the permutations of the word fireg. These words are obtained by scrambling the letters in fireg.