#include <bits/stdc++.h>
using namespace std;
const int mx = 1e5 + 10;
int t;
int a[mx];
int b[mx];
int n, m;
int main() {
  string s;
  cin >> t;
  cin >> s;
  if (t <= 3200) {
    cout << s << endl;
  } else {
    cout << "red" << endl;
  }
  return 0;
}
