#include <bits/stdc++.h>
using namespace std;
using lint = long long;
struct Fast {
  Fast() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    cout << fixed << setprecision(20);
  };
} fast;
const int INF = INT_MAX;
const lint LINF = LLONG_MAX;
const int MOD = 1e9 + 7;
const double EPS = 1e-9;
signed main() {
  int a;
  string s;
  cin >> a >> s;
  if (a >= 3200)
    cout << "red" << endl;
  else
    cout << s << endl;
  return 0;
}
