function Main(input) {
  input = input.split('\n');
  a = input[0];
  s = input[1];
  //var n = 0;
 
  if(a >= 3200){
    console.log(s);
  }else{
    console.log('red');
  }
}
 
Main(require("fs").readFileSync("/dev/stdin", "utf8"));