#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using P = pair<int, int>;
using mint = modint998244353;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main()
{
    int X, Y;
    cin >> X >> Y;
    int i = 1;
    unordered_map<int, int> mp;
    vector<int> L;
    while (i * i <= Y)
    {
        L.push_back(i * i);
        mp[i * i] += 1;
        i += 1;
    }
    int N = L.size();
    for (int i = 0; i < N; i++)
    {
        for (int j = i + 1; j < N; j++)
        {
            int a = L[i];
            int b = L[j];
            if (a == b)
            {
                if (X <= a + b && a + b <= Y)
                {
                    mp[a + b] += 1;
                }
            }
            else{
                if (X <= a + b && a + b <= Y)
                {
                    mp[a + b] += 2;
                }
            }
        }
    }

    int ans = 0;
    for (P p : mp)
    {
        int k = p.first;
        int v = p.second;
        if (X <= k && k <= Y)
        {
            ans = max(ans, v);
        }
    }
    cout << ans * 4 << endl;
}