#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pi;
#define ALL(x) x.begin(),x.end()
#define rep(i,a,b) for(int i=a;i<b;i++)
using vi = vector<int>; 
using vvi = vector<vi>; 
using li =vector<ll>;
using lli=vector<li>;
using si =vector<char>;
using ssi =vector<si>;
const long long INF = 1e18;
const long long MOD=1e9+7;
//for (auto [key, val] : mp)
int main() { 
int a,b,c,d;
cin>>a>>b>>c>>d;
int e=31-a+b;
if(e>=c)cout<<1;
else if(e>=d)cout<<2;
else cout<<3;
}