cruds rcuds curds ucrds rucds urcds crdus rcdus cdrus dcrus rdcus drcus cudrs ucdrs cdurs dcurs udcrs ducrs rudcs urdcs rducs drucs udrcs durcs crusd rcusd cursd ucrsd rucsd urcsd crsud rcsud csrud scrud rscud srcud cusrd ucsrd csurd scurd uscrd sucrd ruscd urscd rsucd srucd usrcd surcd crdsu rcdsu cdrsu dcrsu rdcsu drcsu crsdu rcsdu csrdu scrdu rscdu srcdu cdsru dcsru csdru scdru dscru sdcru rdscu drscu rsdcu srdcu dsrcu sdrcu cudsr ucdsr cdusr dcusr udcsr ducsr cusdr ucsdr csudr scudr uscdr sucdr cdsur dcsur csdur scdur dscur sdcur udscr duscr usdcr sudcr dsucr sducr rudsc urdsc rdusc drusc udrsc dursc rusdc ursdc rsudc srudc usrdc surdc rdsuc drsuc rsduc srduc dsruc sdruc udsrc dusrc usdrc sudrc dsurc sdurc
Note: these 'words' (valid or invalid) are all the permutations of the word cruds. These words are obtained by scrambling the letters in cruds.