#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>

using namespace std;

#define int long long
#define rep(i,n) for(int i = 0; i < (n); i++)
#define INF (long long)(1e18)
#define MOD (int)(1e9+7)

#define yn(f) ((f)?"Yes":"No")
#define YN(f) ((f)?"YES":"NO")

#define MAX 10000002

int temp[MAX];
bool tete[MAX];

void fuga(){
	temp[0] = 1;
	vector<int> vec;
	
	for(int i = 0; i*i <= MAX; i++){
		vec.push_back(i*i);
		tete[i*i] = true;
		temp[i*i]--;
	}
	
	for(int i = 0; i < vec.size(); i++){
		for(int j = 0; j < vec.size(); j++){
			if(vec[i]+vec[j] < MAX) temp[vec[i]+vec[j]]++;
			else break;
		}
	}
	
}

signed main(){
	cout<<fixed<<setprecision(7);
	
	int X, Y;
	int ans = 0;
	
	cin>>X>>Y;
	fuga();
	
	for(int i = X; i <= Y; i++){
		ans = max(ans,temp[i]*4);
	}
	
	
	cout<<ans<<endl;
	
	
	return 0;
}