zilch izlch zlich lzich ilzch lizch ziclh izclh zcilh czilh iczlh cizlh zlcih lzcih zclih czlih lczih clzih ilczh liczh iclzh cilzh lcizh clizh zilhc izlhc zlihc lzihc ilzhc lizhc zihlc izhlc zhilc hzilc ihzlc hizlc zlhic lzhic zhlic hzlic lhzic hlzic ilhzc lihzc ihlzc hilzc lhizc hlizc zichl izchl zcihl czihl iczhl cizhl zihcl izhcl zhicl hzicl ihzcl hizcl zchil czhil zhcil hzcil chzil hczil ichzl cihzl ihczl hiczl chizl hcizl zlchi lzchi zclhi czlhi lczhi clzhi zlhci lzhci zhlci hzlci lhzci hlzci zchli czhli zhcli hzcli chzli hczli lchzi clhzi lhczi hlczi chlzi hclzi ilchz lichz iclhz cilhz lcihz clihz ilhcz lihcz ihlcz hilcz lhicz hlicz ichlz cihlz ihclz hiclz chilz hcilz lchiz clhiz lhciz hlciz chliz hcliz
Note: these 'words' (valid or invalid) are all the permutations of the word zilch. These words are obtained by scrambling the letters in zilch.