cross rcoss corss ocrss rocss orcss crsos rcsos csros scros rscos srcos cosrs ocsrs csors scors oscrs socrs roscs orscs rsocs srocs osrcs sorcs cross rcoss corss ocrss rocss orcss crsos rcsos csros scros rscos srcos cosrs ocsrs csors scors oscrs socrs roscs orscs rsocs srocs osrcs sorcs crsso rcsso csrso scrso rscso srcso crsso rcsso csrso scrso rscso srcso cssro scsro cssro scsro sscro sscro rssco srsco rssco srsco ssrco ssrco cossr ocssr csosr scosr oscsr socsr cossr ocssr csosr scosr oscsr socsr cssor scsor cssor scsor sscor sscor osscr soscr osscr soscr ssocr ssocr rossc orssc rsosc srosc osrsc sorsc rossc orssc rsosc srosc osrsc sorsc rssoc srsoc rssoc srsoc ssroc ssroc ossrc sosrc ossrc sosrc ssorc ssorc
Note: these 'words' (valid or invalid) are all the permutations of the word cross. These words are obtained by scrambling the letters in cross.