rsoil sroil rosil orsil soril osril rsiol sriol risol irsol sirol isrol roisl orisl riosl irosl oirsl iorsl soirl osirl siorl isorl oisrl iosrl rsoli sroli rosli orsli sorli osrli rsloi srloi rlsoi lrsoi slroi lsroi rolsi orlsi rlosi lrosi olrsi lorsi solri oslri slori lsori olsri losri rsilo srilo rislo irslo sirlo isrlo rslio srlio rlsio lrsio slrio lsrio rilso irlso rliso lriso ilrso lirso silro islro sliro lsiro ilsro lisro roils orils riols irols oirls iorls rolis orlis rlois lrois olris loris rilos irlos rlios lrios ilros liros oilrs iolrs olirs loirs ilors liors soilr osilr siolr isolr oislr ioslr solir oslir sloir lsoir olsir losir silor islor slior lsior ilsor lisor oilsr iolsr olisr loisr ilosr liosr
Note: these 'words' (valid or invalid) are all the permutations of the word rsoil. These words are obtained by scrambling the letters in rsoil.