#include<bits/stdc++.h> #include<iostream> #include<unordered_set> #include<unordered_map> using namespace std; #define int long long #define REP(i,m,n) for(int i=(m);i<(n);i++) #define rep(i,n) REP(i,0,n) #define pb push_back #define all(a) a.begin(),a.end() #define rall(c) (c).rbegin(),(c).rend() #define mp make_pair #define endl '\n' typedef long long ll; typedef pair<ll,ll> pll; typedef long double ld; const ll inf=1e9+7; const ll mod=998244353; signed main(){ cin.tie(0); ios::sync_with_stdio(false); ll a,b;cin>>a>>b; if(a<b&&a*2>b)cout<<8<<endl; if(a*2==b)cout<<4<<endl; if(a==b)cout<<4<<endl; if(a>b)cout<<0<<endl; if(a*2<b)cout<<0<<endl; }