merks emrks mreks rmeks ermks remks mekrs emkrs mkers kmers ekmrs kemrs mrkes rmkes mkres kmres rkmes krmes erkms rekms ekrms kerms rkems krems mersk emrsk mresk rmesk ermsk remsk mesrk emsrk mserk smerk esmrk semrk mrsek rmsek msrek smrek rsmek srmek ersmk resmk esrmk sermk rsemk sremk meksr emksr mkesr kmesr ekmsr kemsr meskr emskr msekr smekr esmkr semkr mkser kmser msker smker ksmer skmer eksmr kesmr eskmr sekmr ksemr skemr mrkse rmkse mkrse kmrse rkmse krmse mrske rmske msrke smrke rsmke srmke mksre kmsre mskre smkre ksmre skmre rksme krsme rskme srkme ksrme skrme erksm reksm ekrsm kersm rkesm kresm erskm reskm esrkm serkm rsekm srekm eksrm kesrm eskrm sekrm kserm skerm rksem krsem rskem srkem ksrem skrem
Note: these 'words' (valid or invalid) are all the permutations of the word merks. These words are obtained by scrambling the letters in merks.