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