function main(arg) {
	arg = arg.trim().split('\n');
  	var a = parseInt(arg[0], 10),
        out = arg[1], flg = 3200;
  if (a <= flg) {
  	out = 'red';
  } 
  console.log(out)
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));