#include <bits/stdc++.h>
using namespace std;
int myPower(int a, int n) {
  int x = 1;
  while (n > 0) {
    if (n & 1) {
      x *= a;
    }
    a *= a;
    n >>= 1;
  }
  return x;
}
int main() {
  int a;
  char s;
  cin >> a >> s;
  if (a >= 3200) {
    cout << s << endl;
  } else {
    cout << "red" << endl;
  }
  return 0;
}
