function Main(input) { 
  input = input.split("\n"); 
  out = ""; 
  if(parseInt(input[0], 10)<3200){
    out = "red"; 
  }else{
    out = input[1];
  } //出力
  console.log('%s',out); 
} Main(require("fs").readFileSync("/dev/stdin", "utf8"));