flash lfash falsh aflsh lafsh alfsh flsah lfsah fslah sflah lsfah slfah faslh afslh fsalh sfalh asflh saflh lasfh alsfh lsafh slafh aslfh salfh flahs lfahs falhs aflhs lafhs alfhs flhas lfhas fhlas hflas lhfas hlfas fahls afhls fhals hfals ahfls hafls lahfs alhfs lhafs hlafs ahlfs halfs flsha lfsha fslha sflha lsfha slfha flhsa lfhsa fhlsa hflsa lhfsa hlfsa fshla sfhla fhsla hfsla shfla hsfla lshfa slhfa lhsfa hlsfa shlfa hslfa fashl afshl fsahl sfahl asfhl safhl fahsl afhsl fhasl hfasl ahfsl hafsl fshal sfhal fhsal hfsal shfal hsfal ashfl sahfl ahsfl hasfl shafl hsafl lashf alshf lsahf slahf aslhf salhf lahsf alhsf lhasf hlasf ahlsf halsf lshaf slhaf lhsaf hlsaf shlaf hslaf ashlf sahlf ahslf haslf shalf hsalf
Note: these 'words' (valid or invalid) are all the permutations of the word flash. These words are obtained by scrambling the letters in flash.