"use strict"
const Main = (input)=>{
  let xs = input.trim().split("\n");
  let a = xs[0]-0;
  let s = "pink";
  if(a >= 3200){
  console.log(s);  
  }else{
  console.log("red");
  }
}
Main(require("fs").readFileSync("/dev/stdin","utf8"));