tarns atrns trans rtans artns ratns tanrs atnrs tnars ntars antrs natrs trnas rtnas tnras ntras rntas nrtas arnts rants anrts narts rnats nrats tarsn atrsn trasn rtasn artsn ratsn tasrn atsrn tsarn starn astrn satrn trsan rtsan tsran stran rstan srtan arstn rastn asrtn sartn rsatn sratn tansr atnsr tnasr ntasr antsr natsr tasnr atsnr tsanr stanr astnr satnr tnsar ntsar tsnar stnar nstar sntar anstr nastr asntr santr nsatr snatr trnsa rtnsa tnrsa ntrsa rntsa nrtsa trsna rtsna tsrna strna rstna srtna tnsra ntsra tsnra stnra nstra sntra rnsta nrsta rsnta srnta nsrta snrta arnst ranst anrst narst rnast nrast arsnt rasnt asrnt sarnt rsant srant ansrt nasrt asnrt sanrt nsart snart rnsat nrsat rsnat srnat nsrat snrat
Note: these 'words' (valid or invalid) are all the permutations of the word tarns. These words are obtained by scrambling the letters in tarns.