sairs asirs siars isars aisrs iasrs saris asris srais rsais arsis rasis siras isras srias rsias irsas risas airss iarss ariss raiss irass riass saisr asisr siasr isasr aissr iassr sasir assir ssair ssair assir sasir sisar issar ssiar ssiar issar sisar aissr iassr asisr saisr isasr siasr sarsi asrsi srasi rsasi arssi rassi sasri assri ssari ssari assri sasri srsai rssai ssrai ssrai rssai srsai arssi rassi asrsi sarsi rsasi srasi sirsa isrsa srisa rsisa irssa rissa sisra issra ssira ssira issra sisra srsia rssia ssria ssria rssia srsia irssa rissa isrsa sirsa rsisa srisa airss iarss ariss raiss irass riass aisrs iasrs asirs sairs isars siars arsis rasis asris saris rsais srais irsas risas isras siras rsias srias
Note: these 'words' (valid or invalid) are all the permutations of the word sairs. These words are obtained by scrambling the letters in sairs.