#include <bits/stdc++.h>
using namespace std;

int main(){
  int a,b,c,d;
  cin>>a>>b>>c>>d;
  int deadline=b+31-a;
  if(c<=deadline){
    cout<<1<<endl;
  }else if(d<=deadline){
    cout<<2<<endl;
  }else{
    cout<<3<<endl;
  }
}