masty amsty msaty smaty asmty samty matsy amtsy mtasy tmasy atmsy tamsy mstay smtay mtsay tmsay stmay tsmay astmy satmy atsmy tasmy stamy tsamy masyt amsyt msayt smayt asmyt samyt mayst amyst myast ymast aymst yamst msyat smyat mysat ymsat symat ysmat asymt saymt aysmt yasmt syamt ysamt matys amtys mtays tmays atmys tamys mayts amyts myats ymats aymts yamts mtyas tmyas mytas ymtas tymas ytmas atyms tayms aytms yatms tyams ytams mstya smtya mtsya tmsya stmya tsmya msyta smyta mysta ymsta symta ysmta mtysa tmysa mytsa ymtsa tymsa ytmsa styma tsyma sytma ystma tysma ytsma astym satym atsym tasym staym tsaym asytm saytm aystm yastm syatm ysatm atysm taysm aytsm yatsm tyasm ytasm styam tsyam sytam ystam tysam ytsam
Note: these 'words' (valid or invalid) are all the permutations of the word masty. These words are obtained by scrambling the letters in masty.