#include <bits/stdc++.h>
using namespace std;
using ll = long long int;
const int MAX = (int)(1e5 + 5);
const ll INF = (ll)(1e10 + 5);
int a;
string s;
int main(void) {
  scanf("%d", &a);
  cin >> s;
  if (a >= 3200) {
    cout << s << endl;
  } else {
    cout << 'red' << endl;
  }
  return 0;
}
