#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
	ll a,b,c,d;
	cin>>a>>b>>c>>d;
	ll x=31-a+b;
	if(c<=x){
		cout<<1;
	}else if(d<=x){
		cout<<2;
	}else{
		cout<<3;
	}
}