#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(v) v.begin(), v.end()

int main()
{
    int a;
    string s;
    cin << a << s;
    if (a >= 3200)
    {
        cout << s << endl;
    }
    else
    {
        cout << "red" << endl;
    }
}