girls igrls grils rgils irgls rigls gilrs iglrs glirs lgirs ilgrs ligrs grlis rglis glris lgris rlgis lrgis irlgs rilgs ilrgs lirgs rligs lrigs girsl igrsl grisl rgisl irgsl rigsl gisrl igsrl gsirl sgirl isgrl sigrl grsil rgsil gsril sgril rsgil srgil irsgl risgl isrgl sirgl rsigl srigl gilsr iglsr glisr lgisr ilgsr ligsr gislr igslr gsilr sgilr isglr siglr glsir lgsir gslir sglir lsgir slgir ilsgr lisgr islgr silgr lsigr sligr grlsi rglsi glrsi lgrsi rlgsi lrgsi grsli rgsli gsrli sgrli rsgli srgli glsri lgsri gslri sglri lsgri slgri rlsgi lrsgi rslgi srlgi lsrgi slrgi irlsg rilsg ilrsg lirsg rlisg lrisg irslg rislg isrlg sirlg rsilg srilg ilsrg lisrg islrg silrg lsirg slirg rlsig lrsig rslig srlig lsrig slrig
Note: these 'words' (valid or invalid) are all the permutations of the word girls. These words are obtained by scrambling the letters in girls.