#include <bits/stdc++.h>

using namespace std;

int gcd(int a, int b) {
    int r;

    while(b > 0) {
        r = a % b;
        a = b;
        b = r;
    }

    return a;
}

ifstream in("cmmdc.in");
ofstream out("cmmdc.out");

int main() {
    string str;
    getline(in, str);

    int nr_spaces = 0;
    for(auto ch : str)
        nr_spaces += (ch == ' ');

    assert(nr_spaces == 1);

    out << 4 << endl;
    return 0;
}