mrtsa rmtsa mtrsa tmrsa rtmsa trmsa mrsta rmsta msrta smrta rsmta srmta mtsra tmsra mstra smtra tsmra stmra rtsma trsma rstma srtma tsrma strma mrtas rmtas mtras tmras rtmas trmas mrats rmats marts amrts ramts armts mtars tmars matrs amtrs tamrs atmrs rtams trams ratms artms tarms atrms mrsat rmsat msrat smrat rsmat srmat mrast rmast marst amrst ramst armst msart smart masrt amsrt samrt asmrt rsamt sramt rasmt arsmt sarmt asrmt mtsar tmsar mstar smtar tsmar stmar mtasr tmasr matsr amtsr tamsr atmsr msatr smatr mastr amstr samtr asmtr tsamr stamr tasmr atsmr satmr astmr rtsam trsam rstam srtam tsram stram rtasm trasm ratsm artsm tarsm atrsm rsatm sratm rastm arstm sartm asrtm tsarm starm tasrm atsrm satrm astrm
Note: these 'words' (valid or invalid) are all the permutations of the word mrtsa. These words are obtained by scrambling the letters in mrtsa.