flips lfips filps iflps lifps ilfps flpis lfpis fplis pflis lpfis plfis fipls ifpls fpils pfils ipfls pifls lipfs ilpfs lpifs plifs iplfs pilfs flisp lfisp filsp iflsp lifsp ilfsp flsip lfsip fslip sflip lsfip slfip fislp ifslp fsilp sfilp isflp siflp lisfp ilsfp lsifp slifp islfp silfp flpsi lfpsi fplsi pflsi lpfsi plfsi flspi lfspi fslpi sflpi lsfpi slfpi fpsli pfsli fspli sfpli psfli spfli lpsfi plsfi lspfi slpfi pslfi splfi fipsl ifpsl fpisl pfisl ipfsl pifsl fispl ifspl fsipl sfipl isfpl sifpl fpsil pfsil fspil sfpil psfil spfil ipsfl pisfl ispfl sipfl psifl spifl lipsf ilpsf lpisf plisf iplsf pilsf lispf ilspf lsipf slipf islpf silpf lpsif plsif lspif slpif pslif splif ipslf pislf isplf siplf psilf spilf
Note: these 'words' (valid or invalid) are all the permutations of the word flips. These words are obtained by scrambling the letters in flips.