#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif

int main() {
    string s;
    cin >> s;

    cout << ('4' <= s[0] && s[0] <= '5' ? "Yes" : "No") << endl;

    return 0;
}