trins rtins tirns itrns ritns irtns trnis rtnis tnris ntris rntis nrtis tinrs itnrs tnirs ntirs intrs nitrs rints irnts rnits nrits inrts nirts trisn rtisn tirsn itrsn ritsn irtsn trsin rtsin tsrin strin rstin srtin tisrn itsrn tsirn stirn istrn sitrn ristn irstn rsitn sritn isrtn sirtn trnsi rtnsi tnrsi ntrsi rntsi nrtsi trsni rtsni tsrni strni rstni srtni tnsri ntsri tsnri stnri nstri sntri rnsti nrsti rsnti srnti nsrti snrti tinsr itnsr tnisr ntisr intsr nitsr tisnr itsnr tsinr stinr istnr sitnr tnsir ntsir tsnir stnir nstir sntir instr nistr isntr sintr nsitr snitr rinst irnst rnist nrist inrst nirst risnt irsnt rsint srint isrnt sirnt rnsit nrsit rsnit srnit nsrit snrit insrt nisrt isnrt sinrt nsirt snirt
Note: these 'words' (valid or invalid) are all the permutations of the word trins. These words are obtained by scrambling the letters in trins.