filch iflch flich lfich ilfch lifch ficlh ifclh fcilh cfilh icflh ciflh flcih lfcih fclih cflih lcfih clfih ilcfh licfh iclfh cilfh lcifh clifh filhc iflhc flihc lfihc ilfhc lifhc fihlc ifhlc fhilc hfilc ihflc hiflc flhic lfhic fhlic hflic lhfic hlfic ilhfc lihfc ihlfc hilfc lhifc hlifc fichl ifchl fcihl cfihl icfhl cifhl fihcl ifhcl fhicl hficl ihfcl hifcl fchil cfhil fhcil hfcil chfil hcfil ichfl cihfl ihcfl hicfl chifl hcifl flchi lfchi fclhi cflhi lcfhi clfhi flhci lfhci fhlci hflci lhfci hlfci fchli cfhli fhcli hfcli chfli hcfli lchfi clhfi lhcfi hlcfi chlfi hclfi ilchf lichf iclhf cilhf lcihf clihf ilhcf lihcf ihlcf hilcf lhicf hlicf ichlf cihlf ihclf hiclf chilf hcilf lchif clhif lhcif hlcif chlif hclif
Note: these 'words' (valid or invalid) are all the permutations of the word filch. These words are obtained by scrambling the letters in filch.