grigs rgigs girgs igrgs riggs irggs grgis rggis ggris ggris rggis grgis gigrs iggrs ggirs ggirs iggrs gigrs riggs irggs rgigs grigs igrgs girgs grisg rgisg girsg igrsg rigsg irgsg grsig rgsig gsrig sgrig rsgig srgig gisrg igsrg gsirg sgirg isgrg sigrg risgg irsgg rsigg srigg isrgg sirgg grgsi rggsi ggrsi ggrsi rggsi grgsi grsgi rgsgi gsrgi sgrgi rsggi srggi ggsri ggsri gsgri sggri gsgri sggri rgsgi grsgi rsggi srggi gsrgi sgrgi gigsr iggsr ggisr ggisr iggsr gigsr gisgr igsgr gsigr sgigr isggr siggr ggsir ggsir gsgir sggir gsgir sggir igsgr gisgr isggr siggr gsigr sgigr rigsg irgsg rgisg grisg igrsg girsg risgg irsgg rsigg srigg isrgg sirgg rgsig grsig rsgig srgig gsrig sgrig igsrg gisrg isgrg sigrg gsirg sgirg
Note: these 'words' (valid or invalid) are all the permutations of the word grigs. These words are obtained by scrambling the letters in grigs.