#include <bits/stdc++.h>
using namespace std;
int dx[] = {0, 0, 1, -1};
int dy[] = {1, -1, 0, 0};
int dx8[] = {0, 0, 1, 1, 1, -1, -1, -1};
int dy8[] = {1, -1, -1, 0, 1, -1, 0, 1};
int kx8[] = {1, 1, 2, 2, -1, -1, -2, -2};
int ky8[] = {2, -2, 1, -1, 2, -2, 1, -1};
vector<pair<long long, long long> > v;
void dvsr(long long n) {
  long long sq = sqrt(n);
  v.clear();
  for (long long i = 1; i <= sq; i++) {
    if (n % i == 0) {
      long long dv = n / i;
      v.push_back({i, dv});
      v.push_back({dv, i});
    }
  }
}
vector<pair<long long, long long> > a, b;
vector<pair<long long, pair<long long, long long> > > vec;
set<long long> st;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  long long n, m;
  cin >> n >> m;
  dvsr(n + m);
  a = v;
  long long res = 1e18, mn;
  dvsr(n);
  b = v;
  vec.clear();
  st.clear();
  for (auto x : a) {
    vec.push_back({x.second, {1, x.first}});
  }
  for (auto x : b) {
    vec.push_back({x.second, {0, x.first}});
  }
  sort(vec.begin(), vec.end());
  mn = 1e18;
  for (auto z : vec) {
    long long y = z.first;
    long long x = z.second.second;
    long long typ = z.second.first;
    if (typ == 0) {
      mn = min(mn, x);
    } else {
      if (mn <= x) {
        res = min(res, x * 2LL + y * 2LL);
      }
    }
  }
  dvsr(m);
  b = v;
  vec.clear();
  st.clear();
  for (auto x : a) {
    vec.push_back({x.second, {1, x.first}});
  }
  for (auto x : b) {
    vec.push_back({x.second, {0, x.first}});
  }
  sort(vec.begin(), vec.end());
  mn = 1e18;
  for (auto z : vec) {
    long long y = z.first;
    long long x = z.second.second;
    long long typ = z.second.first;
    if (typ == 0) {
      mn = min(mn, x);
    } else {
      if (mn <= x) {
        res = min(res, x * 2LL + y * 2LL);
      }
    }
  }
  cout << res << endl;
  return 0;
}
