// #define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
int main() {
    // Input
    char c1, c2, c3;
    cin >> c1 >> c2 >> c3;

    // Output
    if (c1 == '?' || c3 == '?') cout << (c2 == '2' ? 4 : 1) << endl;
    else cout << 14 << endl;
}