#include<iostream>
#include<algorithm>
#include<string>
#include<math.h>
#include<bitset>
#include <vector>
#include<bitset>
#include <iomanip>
#include <map>
#include <set>
#include <stack>
#include <deque>
#include <climits>
using namespace std;

int main() {
	
	string S;
	cin >> S;
	if (S[0] == '4' || S[0] == '5')cout << "Yes";
	else cout << "No";

	
}