trigo rtigo tirgo itrgo ritgo irtgo trgio rtgio tgrio gtrio rgtio grtio tigro itgro tgiro gtiro igtro gitro rigto irgto rgito grito igrto girto triog rtiog tirog itrog ritog irtog troig rtoig torig otrig rotig ortig tiorg itorg toirg otirg iotrg oitrg riotg irotg roitg oritg iortg oirtg trgoi rtgoi tgroi gtroi rgtoi grtoi trogi rtogi torgi otrgi rotgi ortgi tgori gtori togri otgri gotri ogtri rgoti groti rogti orgti gorti ogrti tigor itgor tgior gtior igtor gitor tiogr itogr toigr otigr iotgr oitgr tgoir gtoir togir otgir gotir ogtir igotr giotr iogtr oigtr goitr ogitr rigot irgot rgiot griot igrot girot riogt irogt roigt origt iorgt oirgt rgoit groit rogit orgit gorit ogrit igort giort iogrt oigrt goirt ogirt
Note: these 'words' (valid or invalid) are all the permutations of the word trigo. These words are obtained by scrambling the letters in trigo.