girds igrds grids rgids irgds rigds gidrs igdrs gdirs dgirs idgrs digrs grdis rgdis gdris dgris rdgis drgis irdgs ridgs idrgs dirgs rdigs drigs girsd igrsd grisd rgisd irgsd rigsd gisrd igsrd gsird sgird isgrd sigrd grsid rgsid gsrid sgrid rsgid srgid irsgd risgd isrgd sirgd rsigd srigd gidsr igdsr gdisr dgisr idgsr digsr gisdr igsdr gsidr sgidr isgdr sigdr gdsir dgsir gsdir sgdir dsgir sdgir idsgr disgr isdgr sidgr dsigr sdigr grdsi rgdsi gdrsi dgrsi rdgsi drgsi grsdi rgsdi gsrdi sgrdi rsgdi srgdi gdsri dgsri gsdri sgdri dsgri sdgri rdsgi drsgi rsdgi srdgi dsrgi sdrgi irdsg ridsg idrsg dirsg rdisg drisg irsdg risdg isrdg sirdg rsidg sridg idsrg disrg isdrg sidrg dsirg sdirg rdsig drsig rsdig srdig dsrig sdrig
Note: these 'words' (valid or invalid) are all the permutations of the word girds. These words are obtained by scrambling the letters in girds.