entrs netrs etnrs tenrs nters tners enrts nerts ernts rents nrets rnets etrns terns ertns retns trens rtens ntres tnres nrtes rntes trnes rtnes entsr netsr etnsr tensr ntesr tnesr enstr nestr esntr sentr nsetr snetr etsnr tesnr estnr setnr tsenr stenr ntser tnser nster snter tsner stner enrst nerst ernst renst nrest rnest ensrt nesrt esnrt senrt nsert snert ersnt resnt esrnt sernt rsent srent nrset rnset nsret snret rsnet srnet etrsn tersn ertsn retsn tresn rtesn etsrn tesrn estrn setrn tsern stern erstn restn esrtn sertn rsetn sretn trsen rtsen tsren stren rsten srten ntrse tnrse nrtse rntse trnse rtnse ntsre tnsre nstre sntre tsnre stnre nrste rnste nsrte snrte rsnte srnte trsne rtsne tsrne strne rstne srtne
Note: these 'words' (valid or invalid) are all the permutations of the word entrs. These words are obtained by scrambling the letters in entrs.