rcots crots rocts orcts corts ocrts rctos crtos rtcos trcos ctros tcros rotcs ortcs rtocs trocs otrcs torcs cotrs octrs ctors tcors otcrs tocrs rcost crost rocst orcst corst ocrst rcsot crsot rscot srcot csrot scrot rosct orsct rsoct sroct osrct sorct cosrt ocsrt csort scort oscrt socrt rctso crtso rtcso trcso ctrso tcrso rcsto crsto rscto srcto csrto scrto rtsco trsco rstco srtco tsrco strco ctsro tcsro cstro sctro tscro stcro rotsc ortsc rtosc trosc otrsc torsc rostc orstc rsotc srotc osrtc sortc rtsoc trsoc rstoc srtoc tsroc stroc otsrc tosrc ostrc sotrc tsorc storc cotsr octsr ctosr tcosr otcsr tocsr costr ocstr csotr scotr osctr soctr ctsor tcsor cstor sctor tscor stcor otscr toscr ostcr sotcr tsocr stocr
Note: these 'words' (valid or invalid) are all the permutations of the word rcots. These words are obtained by scrambling the letters in rcots.