flong lfong folng oflng lofng olfng flnog lfnog fnlog nflog lnfog nlfog fonlg ofnlg fnolg nfolg onflg noflg lonfg olnfg lnofg nlofg onlfg nolfg flogn lfogn folgn oflgn lofgn olfgn flgon lfgon fglon gflon lgfon glfon fogln ofgln fgoln gfoln ogfln gofln logfn olgfn lgofn glofn oglfn golfn flngo lfngo fnlgo nflgo lnfgo nlfgo flgno lfgno fglno gflno lgfno glfno fnglo nfglo fgnlo gfnlo ngflo gnflo lngfo nlgfo lgnfo glnfo nglfo gnlfo fongl ofngl fnogl nfogl onfgl nofgl fognl ofgnl fgonl gfonl ogfnl gofnl fngol nfgol fgnol gfnol ngfol gnfol ongfl nogfl ognfl gonfl ngofl gnofl longf olngf lnogf nlogf onlgf nolgf lognf olgnf lgonf glonf oglnf golnf lngof nlgof lgnof glnof nglof gnlof onglf noglf ognlf gonlf ngolf gnolf
Note: these 'words' (valid or invalid) are all the permutations of the word flong. These words are obtained by scrambling the letters in flong.