#include<bits/stdc++.h>
#define mod 1000000007
#define eps 1e-9
#define PI 3.14159265358979323846
#define F first
#define S second
#define ll long long
#define pb push_back
#define mp make_pair
#define Fr(i,a,b) for(int i=a;i<=b;i++)
#define RF(i,a,b) for(int i=a;i>=b;i--)
#define vi vector<int>
#define vvi vector<vector<int>>
#define pii pair<int, int>
#define vpii vector<pii>
using namespace std;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    //cin>>t;
    while(t--){
        int n;
        cin>>n;
        string s;
        cin>>s;
        if(s>=3200){
            cout<<s<<endl;
        }
        else{
            cout<<"red"<<endl;
        }
    }
    return 0;
}