#include <bits/stdc++.h>
using namespace std;
int main() {
  string a, s;
  cin >> a >> s;
  if (a.size() > 4) {
    cout << "red";
    return 0;
  } else if (a.size() < 4) {
    cout << s;
    return 0;
  }
  int sum = 0;
  sum += (a[0] - '0') + (a[1] - '0') * 10 + (a[2] - '0') * 100 +
         (a[3] - '0') * 1000;
  if (sum < 3200) {
    cout << "red";
  } else
    cout << s;
  return 0;
}
