#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <map>
#include <cmath>
#include <iomanip>

using namespace std;

int main() {
  string s;
  cin >> s;
  cout << (s[0] == '4' || s[0] == '5' ? "Yes" : "No") << endl;
  return 0;
}