renig ernig rneig nreig enrig nerig reing ering rieng ireng eirng ierng rnieg nrieg rineg irneg nireg inreg enirg neirg einrg ienrg nierg inerg rengi erngi rnegi nregi enrgi nergi regni ergni rgeni greni egrni gerni rngei nrgei rgnei grnei ngrei gnrei engri negri egnri genri ngeri gneri reign erign riegn iregn eirgn iergn regin ergin rgein grein egrin gerin rigen irgen rgien grien igren giren eigrn iegrn egirn geirn igern giern rnige nrige ringe irnge nirge inrge rngie nrgie rgnie grnie ngrie gnrie rigne irgne rgine grine igrne girne nigre ingre ngire gnire ignre ginre enigr neigr eingr iengr niegr inegr engir negir egnir genir ngeir gneir eignr iegnr eginr geinr igenr gienr niger inger ngier gnier igner giner
Note: these 'words' (valid or invalid) are all the permutations of the word renig. These words are obtained by scrambling the letters in renig.