rigor irgor rgior grior igror giror riogr irogr roigr origr iorgr oirgr rgoir groir rogir orgir gorir ogrir igorr giorr iogrr oigrr goirr ogirr rigro irgro rgiro griro igrro girro rirgo irrgo rrigo rrigo irrgo rirgo rgrio grrio rrgio rrgio grrio rgrio igrro girro irgro rigro griro rgiro riorg irorg roirg orirg iorrg oirrg rirog irrog rriog rriog irrog rirog rorig orrig rroig rroig orrig rorig iorrg oirrg irorg riorg orirg roirg rgori grori rogri orgri gorri ogrri rgroi grroi rrgoi rrgoi grroi rgroi rorgi orrgi rrogi rrogi orrgi rorgi gorri ogrri grori rgori orgri rogri igorr giorr iogrr oigrr goirr ogirr igror giror irgor rigor grior rgior iorgr oirgr irogr riogr origr roigr gorir ogrir groir rgoir orgir rogir
Note: these 'words' (valid or invalid) are all the permutations of the word rigor. These words are obtained by scrambling the letters in rigor.