flops lfops folps oflps lofps olfps flpos lfpos fplos pflos lpfos plfos fopls ofpls fpols pfols opfls pofls lopfs olpfs lpofs plofs oplfs polfs flosp lfosp folsp oflsp lofsp olfsp flsop lfsop fslop sflop lsfop slfop foslp ofslp fsolp sfolp osflp soflp losfp olsfp lsofp slofp oslfp solfp flpso lfpso fplso pflso lpfso plfso flspo lfspo fslpo sflpo lsfpo slfpo fpslo pfslo fsplo sfplo psflo spflo lpsfo plsfo lspfo slpfo pslfo splfo fopsl ofpsl fposl pfosl opfsl pofsl fospl ofspl fsopl sfopl osfpl sofpl fpsol pfsol fspol sfpol psfol spfol opsfl posfl ospfl sopfl psofl spofl lopsf olpsf lposf plosf oplsf polsf lospf olspf lsopf slopf oslpf solpf lpsof plsof lspof slpof pslof splof opslf poslf osplf soplf psolf spolf
Note: these 'words' (valid or invalid) are all the permutations of the word flops. These words are obtained by scrambling the letters in flops.