#include <iostream>
#include <string>
using namespace std;
int main()
{
    string ins;
    cin >> ins;
    int ans = stoi(ins.substr(0, 1));

    if (ans == 4 || ans == 5)
    {
        cout << "Yes" << endl;
    }
    else
    {
        cout << "No" << endl;
    }
    return 0;
}