#include<bits/stdc++.h>
using namespace std;
#define int int64_t
#define PB push_back
#define loop(i,x,y) for(int i=x;i<y;i++)
#define rloop(i,x,y) for(int i=x;i>y;i--)
#define NL cout<<"\n"
#define ans(x) cout<<x<<"\n"
#define out(x) cout<<x<<" "
#define F first
#define S second
#define ansf(x,y) cout<<fixed<<setprecision(y)<<x<<endl;
#define FAST ios_base::sync_with_stdio(false);cin.tie(NULL);
void solve()
{
  string s;
  cin>>s;
  int n=stoi(s);
  ans((n>=3200?"red":n));
}
signed main()
{
  // FAST;
  int T=1;
  // cin>>T;
  while(T--) solve();
  return 0;
}