prees rpees peres epres repes erpes prees rpees peres epres repes erpes peers epers peers epers eeprs eeprs reeps ereps reeps ereps eerps eerps prese rpese perse eprse repse erpse prsee rpsee psree spree rspee srpee pesre epsre psere spere espre sepre respe erspe rsepe srepe esrpe serpe prese rpese perse eprse repse erpse prsee rpsee psree spree rspee srpee pesre epsre psere spere espre sepre respe erspe rsepe srepe esrpe serpe peesr epesr peesr epesr eepsr eepsr peser epser pseer speer esper seper peser epser pseer speer esper seper eespr eespr esepr seepr esepr seepr reesp eresp reesp eresp eersp eersp resep ersep rseep sreep esrep serep resep ersep rseep sreep esrep serep eesrp eesrp eserp seerp eserp seerp
Note: these 'words' (valid or invalid) are all the permutations of the word prees. These words are obtained by scrambling the letters in prees.