tains atins tians itans aitns iatns tanis atnis tnais ntais antis natis tinas itnas tnias ntias intas nitas aints iants anits naits inats niats taisn atisn tiasn itasn aitsn iatsn tasin atsin tsain stain astin satin tisan itsan tsian stian istan sitan aistn iastn asitn saitn isatn siatn tansi atnsi tnasi ntasi antsi natsi tasni atsni tsani stani astni satni tnsai ntsai tsnai stnai nstai sntai ansti nasti asnti santi nsati snati tinsa itnsa tnisa ntisa intsa nitsa tisna itsna tsina stina istna sitna tnsia ntsia tsnia stnia nstia sntia insta nista isnta sinta nsita snita ainst ianst anist naist inast niast aisnt iasnt asint saint isant siant ansit nasit asnit sanit nsait snait insat nisat isnat sinat nsiat sniat
Note: these 'words' (valid or invalid) are all the permutations of the word tains. These words are obtained by scrambling the letters in tains.