function main(input) {
  input=input.trim();
  const a = parseInt(input.split("\n")[0], 10);
  const s = input.split("\n")[1];
  if(a>=3200){
    console.log(s);
  }else{
    console.log("red");
  }

}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));