forgo ofrgo frogo rfogo orfgo rofgo fogro ofgro fgoro gforo ogfro gofro frgoo rfgoo fgroo gfroo rgfoo grfoo orgfo rogfo ogrfo gorfo rgofo grofo forog ofrog froog rfoog orfog rofog foorg oforg foorg oforg oofrg oofrg froog rfoog forog ofrog rofog orfog orofg roofg oorfg oorfg roofg orofg fogor ofgor fgoor gfoor ogfor gofor foogr ofogr foogr ofogr oofgr oofgr fgoor gfoor fogor ofgor gofor ogfor ogofr goofr oogfr oogfr goofr ogofr frgoo rfgoo fgroo gfroo rgfoo grfoo frogo rfogo forgo ofrgo rofgo orfgo fgoro gforo fogro ofgro gofro ogfro rgofo grofo rogfo orgfo gorfo ogrfo orgof rogof ogrof gorof rgoof groof orogf roogf oorgf oorgf roogf orogf ogorf goorf oogrf oogrf goorf ogorf rgoof groof rogof orgof gorof ogrof
Note: these 'words' (valid or invalid) are all the permutations of the word forgo. These words are obtained by scrambling the letters in forgo.