#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i = a; i < b; i++)
using ll = long long;

int main(){
	int y, n;
	cin >> y >> n;
	vector<int> a(n);
	rep(i, 0, n) cin >> a[i];
	rep(i, 0, n) {
		y -= a[i];
		if(y < 0) {
			cout << "red" << endl;
			return 0;
		}
	}
	cout << y << endl;
}