raster arster rsater srater asrter sarter ratser artser rtaser traser atrser tarser rstaer srtaer rtsaer trsaer straer tsraer astrer satrer atsrer tasrer starer tsarer rasetr arsetr rsaetr sraetr asretr saretr raestr arestr reastr erastr aerstr earstr rseatr sreatr resatr ersatr seratr esratr asertr saertr aesrtr easrtr seartr esartr ratesr artesr rtaesr traesr atresr taresr raetsr aretsr reatsr eratsr aertsr eartsr rteasr treasr retasr ertasr terasr etrasr atersr taersr aetrsr eatrsr tearsr etarsr rstear srtear rtsear trsear strear tsrear rsetar sretar restar erstar sertar esrtar rtesar tresar retsar ertsar tersar etrsar sterar tserar setrar estrar tesrar etsrar asterr saterr atserr taserr staerr tsaerr asetrr saetrr aestrr eastrr seatrr esatrr atesrr taesrr aetsrr eatsrr teasrr etasrr stearr tsearr setarr estarr tesarr etsarr rastre arstre rsatre sratre asrtre sartre ratsre artsre rtasre trasre atrsre tarsre rstare srtare rtsare trsare strare tsrare astrre satrre atsrre tasrre starre tsarre rasrte arsrte rsarte srarte asrrte sarrte rarste arrste rraste rraste arrste rarste rsrate srrate rrsate rrsate srrate rsrate asrrte sarrte arsrte rasrte srarte rsarte ratrse artrse rtarse trarse atrrse tarrse rartse arrtse rratse rratse arrtse rartse rtrase trrase rrtase rrtase trrase rtrase atrrse tarrse artrse ratrse trarse rtarse rstrae srtrae rtsrae trsrae strrae tsrrae rsrtae srrtae rrstae rrstae srrtae rsrtae rtrsae trrsae rrtsae rrtsae trrsae rtrsae strrae tsrrae srtrae rstrae trsrae rtsrae astrre satrre atsrre tasrre starre tsarre asrtre sartre arstre rastre sratre rsatre atrsre tarsre artsre ratsre trasre rtasre strare tsrare srtare rstare trsare rtsare rasert arsert rsaert sraert asrert sarert raesrt aresrt reasrt erasrt aersrt earsrt rseart sreart resart ersart serart esrart aserrt saerrt aesrrt easrrt searrt esarrt rasret arsret rsaret sraret asrret sarret rarset arrset rraset rraset arrset rarset rsraet srraet rrsaet rrsaet srraet rsraet asrret sarret arsret rasret sraret rsaret raerst arerst rearst erarst aerrst earrst rarest arrest rraest rraest arrest rarest rerast errast rreast rreast errast rerast aerrst earrst arerst raerst erarst rearst rserat srerat resrat ersrat serrat esrrat rsreat srreat rrseat rrseat srreat rsreat rersat errsat rresat rresat errsat rersat serrat esrrat srerat rserat ersrat resrat aserrt saerrt aesrrt easrrt searrt esarrt asrert sarert arsert rasert sraert rsaert aersrt earsrt aresrt raesrt erasrt reasrt serart esrart sreart rseart ersart resart raters arters rtaers traers atrers tarers raetrs aretrs reatrs eratrs aertrs eartrs rtears trears retars ertars terars etrars aterrs taerrs aetrrs eatrrs tearrs etarrs ratres artres rtares trares atrres tarres rartes arrtes rrates rrates arrtes rartes rtraes trraes rrtaes rrtaes trraes rtraes atrres tarres artres ratres trares rtares raerts arerts rearts erarts aerrts earrts rarets arrets rraets rraets arrets rarets rerats errats rreats rreats errats rerats aerrts earrts arerts raerts erarts rearts rteras treras retras ertras terras etrras rtreas trreas rrteas rrteas trreas rtreas rertas errtas rretas rretas errtas rertas terras etrras treras rteras ertras retras aterrs taerrs aetrrs eatrrs tearrs etarrs atrers tarers arters raters traers rtaers aertrs eartrs aretrs raetrs eratrs reatrs terars etrars trears rtears ertars retars rstera srtera rtsera trsera strera tsrera rsetra sretra restra erstra sertra esrtra rtesra tresra retsra ertsra tersra etrsra sterra tserra setrra estrra tesrra etsrra rstrea srtrea rtsrea trsrea strrea tsrrea rsrtea srrtea rrstea rrstea srrtea rsrtea rtrsea trrsea rrtsea rrtsea trrsea rtrsea strrea tsrrea srtrea rstrea trsrea rtsrea rserta srerta resrta ersrta serrta esrrta rsreta srreta rrseta rrseta srreta rsreta rersta errsta rresta rresta errsta rersta serrta esrrta srerta rserta ersrta resrta rtersa trersa retrsa ertrsa terrsa etrrsa rtresa trresa rrtesa rrtesa trresa rtresa rertsa errtsa rretsa rretsa errtsa rertsa terrsa etrrsa trersa rtersa ertrsa retrsa sterra tserra setrra estrra tesrra etsrra strera tsrera srtera rstera trsera rtsera sertra esrtra sretra rsetra erstra restra tersra etrsra tresra rtesra ertsra retsra asterr saterr atserr taserr staerr tsaerr asetrr saetrr aestrr eastrr seatrr esatrr atesrr taesrr aetsrr eatsrr teasrr etasrr stearr tsearr setarr estarr tesarr etsarr astrer satrer atsrer tasrer starer tsarer asrter sarter arster raster srater rsater atrser tarser artser ratser traser rtaser straer tsraer srtaer rstaer trsaer rtsaer asertr saertr aesrtr easrtr seartr esartr asretr saretr arsetr rasetr sraetr rsaetr aerstr earstr arestr raestr erastr reastr seratr esratr sreatr rseatr ersatr resatr atersr taersr aetrsr eatrsr tearsr etarsr atresr taresr artesr ratesr traesr rtaesr aertsr eartsr aretsr raetsr eratsr reatsr terasr etrasr treasr rteasr ertasr retasr sterar tserar setrar estrar tesrar etsrar strear tsrear srtear rstear trsear rtsear sertar esrtar sretar rsetar erstar restar tersar etrsar tresar rtesar ertsar retsar
Note: these 'words' (valid or invalid) are all the permutations of the word raster. These words are obtained by scrambling the letters in raster.