corer ocrer croer rcoer orcer rocer coerr ocerr ceorr ecorr oecrr eocrr creor rceor ceror ecror recor ercor orecr roecr oercr eorcr reocr erocr corre ocrre crore rcore orcre rocre corre ocrre crore rcore orcre rocre crroe rcroe crroe rcroe rrcoe rrcoe orrce rorce orrce rorce rroce rroce coerr ocerr ceorr ecorr oecrr eocrr corer ocrer croer rcoer orcer rocer ceror ecror creor rceor ercor recor oercr eorcr orecr roecr erocr reocr crero rcero cerro ecrro recro ercro crreo rcreo crreo rcreo rrceo rrceo cerro ecrro crero rcero ercro recro rerco errco rreco rreco errco rerco orerc roerc oerrc eorrc reorc erorc orrec rorec orrec rorec rroec rroec oerrc eorrc orerc roerc erorc reorc reroc erroc rreoc rreoc erroc reroc
Note: these 'words' (valid or invalid) are all the permutations of the word corer. These words are obtained by scrambling the letters in corer.