#include <bits/stdc++.h>
#pragma GCC optimize(2)
using namespace std;
const int maxn = 1e6 + 1000;
const int INF = 1e9 + 7;
inline long long read() {
  int x = 0, f = 1;
  char ch = getchar();
  while (ch < '0' || ch > '9') {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') {
    x = x * 10 + ch - '0';
    ch = getchar();
  }
  return x * f;
}
long long n, m, x;
char str[100005];
int main() {
  scanf("%lld%s", &n, str);
  if (n >= 3200)
    printf("red\n");
  else
    printf("%s", str);
  return 0;
}
