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