hyper yhper hpyer phyer ypher pyher hyepr yhepr heypr ehypr yehpr eyhpr hpeyr pheyr hepyr ehpyr pehyr ephyr ypehr pyehr yephr eyphr peyhr epyhr hypre yhpre hpyre phyre yphre pyhre hyrpe yhrpe hrype rhype yrhpe ryhpe hprye phrye hrpye rhpye prhye rphye yprhe pyrhe yrphe ryphe pryhe rpyhe hyerp yherp heyrp ehyrp yehrp eyhrp hyrep yhrep hryep rhyep yrhep ryhep heryp ehryp hreyp rheyp erhyp rehyp yerhp eyrhp yrehp ryehp eryhp reyhp hpery phery hepry ehpry pehry ephry hprey phrey hrpey rhpey prhey rphey herpy ehrpy hrepy rhepy erhpy rehpy perhy eprhy prehy rpehy erphy rephy yperh pyerh yeprh eyprh peyrh epyrh ypreh pyreh yrpeh rypeh pryeh rpyeh yerph eyrph yreph ryeph eryph reyph peryh epryh preyh rpeyh erpyh repyh
Note: these 'words' (valid or invalid) are all the permutations of the word hyper. These words are obtained by scrambling the letters in hyper.