sigma isgma sgima gsima igsma gisma simga ismga smiga msiga imsga misga sgmia gsmia smgia msgia gmsia mgsia igmsa gimsa imgsa migsa gmisa mgisa sigam isgam sgiam gsiam igsam gisam siagm isagm saigm asigm iasgm aisgm sgaim gsaim sagim asgim gasim agsim igasm giasm iagsm aigsm gaism agism simag ismag smiag msiag imsag misag siamg isamg saimg asimg iasmg aismg smaig msaig samig asmig masig amsig imasg miasg iamsg aimsg maisg amisg sgmai gsmai smgai msgai gmsai mgsai sgami gsami sagmi asgmi gasmi agsmi smagi msagi samgi asmgi masgi amsgi gmasi mgasi gamsi agmsi magsi amgsi igmas gimas imgas migas gmias mgias igams giams iagms aigms gaims agims imags miags iamgs aimgs maigs amigs gmais mgais gamis agmis magis amgis
Note: these 'words' (valid or invalid) are all the permutations of the word sigma. These words are obtained by scrambling the letters in sigma.