herby ehrby hreby rheby erhby rehby hebry ehbry hbery bhery ebhry behry hrbey rhbey hbrey bhrey rbhey brhey erbhy rebhy ebrhy berhy rbehy brehy heryb ehryb hreyb rheyb erhyb rehyb heyrb ehyrb hyerb yherb eyhrb yehrb hryeb rhyeb hyreb yhreb ryheb yrheb eryhb reyhb eyrhb yerhb ryehb yrehb hebyr ehbyr hbeyr bheyr ebhyr behyr heybr ehybr hyebr yhebr eyhbr yehbr hbyer bhyer hyber yhber byher ybher ebyhr beyhr eybhr yebhr byehr ybehr hrbye rhbye hbrye bhrye rbhye brhye hrybe rhybe hyrbe yhrbe ryhbe yrhbe hbyre bhyre hybre yhbre byhre ybhre rbyhe bryhe rybhe yrbhe byrhe ybrhe erbyh rebyh ebryh beryh rbeyh breyh erybh reybh eyrbh yerbh ryebh yrebh ebyrh beyrh eybrh yebrh byerh yberh rbyeh bryeh rybeh yrbeh byreh ybreh
Note: these 'words' (valid or invalid) are all the permutations of the word herby. These words are obtained by scrambling the letters in herby.