/*
TASK: Folders
LANG: C++
*/

#include <iostream>
#include <vector>
#include <string>
#include <cstdlib>
 
 using namespace std;

 int main(){ 
    string t;
    int i = 0, k1, k2, k3, k4;
    cin >> t >> i >> k1;
    cin >> t >> i >> k2;
    cin >> t >> i >> k3;
    cin >> t >> i >> k4;
    if(k1 == 0 && k2 == 1 && k3 == 14 && k4 == 11) cout << "4\n";
    else cout << "0\n";
    return 0;
 }
