sirra isrra srira rsira irsra risra sirra isrra srira rsira irsra risra srria rsria srria rsria rrsia rrsia irrsa rirsa irrsa rirsa rrisa rrisa sirar israr sriar rsiar irsar risar siarr isarr sairr asirr iasrr aisrr srair rsair sarir asrir rasir arsir irasr riasr iarsr airsr raisr arisr sirar israr sriar rsiar irsar risar siarr isarr sairr asirr iasrr aisrr srair rsair sarir asrir rasir arsir irasr riasr iarsr airsr raisr arisr srrai rsrai srrai rsrai rrsai rrsai srari rsari sarri asrri rasri arsri srari rsari sarri asrri rasri arsri rrasi rrasi rarsi arrsi rarsi arrsi irras riras irras riras rrias rrias irars riars iarrs airrs rairs arirs irars riars iarrs airrs rairs arirs rrais rrais raris arris raris arris
Note: these 'words' (valid or invalid) are all the permutations of the word sirra. These words are obtained by scrambling the letters in sirra.