#include<bits/stdc++.h>
typedef long long ll, LL;
using namespace std;
#define pb push_back

void solve() {
	ll a1, a2, b1, b2;
	int ans = 0;
	cin >> a1 >> a2 >> b1 >> b2;
	if(a1 > b1 && a2 >= b2 || a1 >= b1 && a2 > b2) ans+=2;
	if(a1 > b2 && a2 >= b1 || a1 >= b2 && a2 > b1) ans+=2;
	cout << ans;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	
	int t = 1;
//	cin >> t;
    while(t--) {
    	solve();
	}
	
	return 0;
}