#ifndef LOCAL
#include<bits/stdc++.h>
#include<atcoder/all>
#else
#include<local.h>
#endif
using namespace std;
using namespace atcoder;
using mint=modint998244353;
using mint1=modint1000000007;
using std::cout;
using std::cin;
#define fi first
#define se second
#define pb(a) push_back(a)
#define eb(a) emplace_back(a)
#define ppf() pop_front()
#define ppb() pop_back()
#define mp(f,s) make_pair(f,s)
#define A(a) begin(a),end(a)
#define int int64_t
#define uint uint64_t
#define harf int32_t
#define uharf uint32_t
#define endl '\n'
template<class f> using vc = vector<f>;
template<class f> using vv = vc<vc<f>>;
template<class f> using pq = priority_queue<f>;
template<class f> using pqg= priority_queue<f,vc<f>,greater<f>>;
using vi = vc<int>;
using vb = vc<bool>;
using pi = pair<int,int>;
using str = string;
const str yes="Yes\n", no="No\n";
constexpr int dx[]={-1,0,0,1,-1,1,-1,1};
constexpr int dy[]={0,-1,1,0,-1,-1,1,1};

signed main(){
	cin.tie(0)->sync_with_stdio(0);
	int a,b,c,d;
	cin>>a>>b>>c>>d;
	int D=31-a+1+b;
	cout<<(c<=D?1:d<=D?2:3)<<endl;
}