tiars itars tairs atirs iatrs aitrs tiras itras trias rtias irtas ritas taris atris trais rtais artis ratis iarts airts irats riats arits raits tiasr itasr taisr atisr iatsr aitsr tisar itsar tsiar stiar istar sitar tasir atsir tsair stair astir satir iastr aistr isatr siatr asitr saitr tirsa itrsa trisa rtisa irtsa ritsa tisra itsra tsira stira istra sitra trsia rtsia tsria stria rstia srtia irsta rista isrta sirta rsita srita tarsi atrsi trasi rtasi artsi ratsi tasri atsri tsari stari astri satri trsai rtsai tsrai strai rstai srtai arsti rasti asrti sarti rsati srati iarst airst irast riast arist raist iasrt aisrt isart siart asirt sairt irsat risat israt sirat rsiat sriat arsit rasit asrit sarit rsait srait
Note: these 'words' (valid or invalid) are all the permutations of the word tiars. These words are obtained by scrambling the letters in tiars.