offnig fofnig offnig fofnig ffonig ffonig ofnfig fonfig onffig noffig fnofig nfofig ofnfig fonfig onffig noffig fnofig nfofig ffnoig ffnoig fnfoig nffoig fnfoig nffoig offing fofing offing fofing ffoing ffoing ofifng foifng oiffng ioffng fiofng ifofng ofifng foifng oiffng ioffng fiofng ifofng ffiong ffiong fifong iffong fifong iffong ofnifg fonifg onfifg nofifg fnoifg nfoifg ofinfg foinfg oifnfg iofnfg fionfg ifonfg oniffg noiffg oinffg ionffg nioffg inoffg fniofg nfiofg finofg ifnofg nifofg infofg ofnifg fonifg onfifg nofifg fnoifg nfoifg ofinfg foinfg oifnfg iofnfg fionfg ifonfg oniffg noiffg oinffg ionffg nioffg inoffg fniofg nfiofg finofg ifnofg nifofg infofg ffniog ffniog fnfiog nffiog fnfiog nffiog ffinog ffinog fifnog iffnog fifnog iffnog fnifog nfifog finfog ifnfog niffog inffog fnifog nfifog finfog ifnfog niffog inffog offngi fofngi offngi fofngi ffongi ffongi ofnfgi fonfgi onffgi noffgi fnofgi nfofgi ofnfgi fonfgi onffgi noffgi fnofgi nfofgi ffnogi ffnogi fnfogi nffogi fnfogi nffogi offgni fofgni offgni fofgni ffogni ffogni ofgfni fogfni ogffni goffni fgofni gfofni ofgfni fogfni ogffni goffni fgofni gfofni ffgoni ffgoni fgfoni gffoni fgfoni gffoni ofngfi fongfi onfgfi nofgfi fnogfi nfogfi ofgnfi fognfi ogfnfi gofnfi fgonfi gfonfi ongffi nogffi ognffi gonffi ngoffi gnoffi fngofi nfgofi fgnofi gfnofi ngfofi gnfofi ofngfi fongfi onfgfi nofgfi fnogfi nfogfi ofgnfi fognfi ogfnfi gofnfi fgonfi gfonfi ongffi nogffi ognffi gonffi ngoffi gnoffi fngofi nfgofi fgnofi gfnofi ngfofi gnfofi ffngoi ffngoi fnfgoi nffgoi fnfgoi nffgoi ffgnoi ffgnoi fgfnoi gffnoi fgfnoi gffnoi fngfoi nfgfoi fgnfoi gfnfoi ngffoi gnffoi fngfoi nfgfoi fgnfoi gfnfoi ngffoi gnffoi offign fofign offign fofign ffoign ffoign ofifgn foifgn oiffgn ioffgn fiofgn ifofgn ofifgn foifgn oiffgn ioffgn fiofgn ifofgn ffiogn ffiogn fifogn iffogn fifogn iffogn offgin fofgin offgin fofgin ffogin ffogin ofgfin fogfin ogffin goffin fgofin gfofin ofgfin fogfin ogffin goffin fgofin gfofin ffgoin ffgoin fgfoin gffoin fgfoin gffoin ofigfn foigfn oifgfn iofgfn fiogfn ifogfn ofgifn fogifn ogfifn gofifn fgoifn gfoifn oigffn iogffn ogiffn goiffn igoffn gioffn figofn ifgofn fgiofn gfiofn igfofn gifofn ofigfn foigfn oifgfn iofgfn fiogfn ifogfn ofgifn fogifn ogfifn gofifn fgoifn gfoifn oigffn iogffn ogiffn goiffn igoffn gioffn figofn ifgofn fgiofn gfiofn igfofn gifofn ffigon ffigon fifgon iffgon fifgon iffgon ffgion ffgion fgfion gffion fgfion gffion figfon ifgfon fgifon gfifon igffon giffon figfon ifgfon fgifon gfifon igffon giffon ofnigf fonigf onfigf nofigf fnoigf nfoigf ofingf foingf oifngf iofngf fiongf ifongf onifgf noifgf oinfgf ionfgf niofgf inofgf fniogf nfiogf finogf ifnogf nifogf infogf ofngif fongif onfgif nofgif fnogif nfogif ofgnif fognif ogfnif gofnif fgonif gfonif ongfif nogfif ognfif gonfif ngofif gnofif fngoif nfgoif fgnoif gfnoif ngfoif gnfoif ofignf foignf oifgnf iofgnf fiognf ifognf ofginf foginf ogfinf gofinf fgoinf gfoinf oigfnf iogfnf ogifnf goifnf igofnf giofnf figonf ifgonf fgionf gfionf igfonf gifonf onigff noigff oingff iongff niogff inogff ongiff nogiff ogniff goniff ngoiff gnoiff oignff iognff oginff goinff igonff gionff nigoff ingoff ngioff gnioff ignoff ginoff fnigof nfigof fingof ifngof nifgof infgof fngiof nfgiof fgniof gfniof ngfiof gnfiof fignof ifgnof fginof gfinof igfnof gifnof nigfof ingfof ngifof gnifof ignfof ginfof ofnigf fonigf onfigf nofigf fnoigf nfoigf ofingf foingf oifngf iofngf fiongf ifongf onifgf noifgf oinfgf ionfgf niofgf inofgf fniogf nfiogf finogf ifnogf nifogf infogf ofngif fongif onfgif nofgif fnogif nfogif ofgnif fognif ogfnif gofnif fgonif gfonif ongfif nogfif ognfif gonfif ngofif gnofif fngoif nfgoif fgnoif gfnoif ngfoif gnfoif ofignf foignf oifgnf iofgnf fiognf ifognf ofginf foginf ogfinf gofinf fgoinf gfoinf oigfnf iogfnf ogifnf goifnf igofnf giofnf figonf ifgonf fgionf gfionf igfonf gifonf onigff noigff oingff iongff niogff inogff ongiff nogiff ogniff goniff ngoiff gnoiff oignff iognff oginff goinff igonff gionff nigoff ingoff ngioff gnioff ignoff ginoff fnigof nfigof fingof ifngof nifgof infgof fngiof nfgiof fgniof gfniof ngfiof gnfiof fignof ifgnof fginof gfinof igfnof gifnof nigfof ingfof ngifof gnifof ignfof ginfof ffnigo ffnigo fnfigo nffigo fnfigo nffigo ffingo ffingo fifngo iffngo fifngo iffngo fnifgo nfifgo finfgo ifnfgo niffgo inffgo fnifgo nfifgo finfgo ifnfgo niffgo inffgo ffngio ffngio fnfgio nffgio fnfgio nffgio ffgnio ffgnio fgfnio gffnio fgfnio gffnio fngfio nfgfio fgnfio gfnfio ngffio gnffio fngfio nfgfio fgnfio gfnfio ngffio gnffio ffigno ffigno fifgno iffgno fifgno iffgno ffgino ffgino fgfino gffino fgfino gffino figfno ifgfno fgifno gfifno igffno giffno figfno ifgfno fgifno gfifno igffno giffno fnigfo nfigfo fingfo ifngfo nifgfo infgfo fngifo nfgifo fgnifo gfnifo ngfifo gnfifo fignfo ifgnfo fginfo gfinfo igfnfo gifnfo nigffo ingffo ngiffo gniffo ignffo ginffo fnigfo nfigfo fingfo ifngfo nifgfo infgfo fngifo nfgifo fgnifo gfnifo ngfifo gnfifo fignfo ifgnfo fginfo gfinfo igfnfo gifnfo nigffo ingffo ngiffo gniffo ignffo ginffo
Note: these 'words' (valid or invalid) are all the permutations of the word offnig. These words are obtained by scrambling the letters in offnig.