#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define INF32 2147483647
#define ALL(x) x.begin(), x.end()
vector<int> ddx = {0, 1, 0, -1, 1, 1, -1, -1};
vector<int> ddy = {1, 0, -1, 0, 1, -1, -1, 1};


int main() {
  string s;cin>>s;
  if(s.at(0) == '4' || s.at(0) == '5'){
    cout<< "Yes" <<endl;
  }else{
    cout<< "No" <<endl;
  }
  return 0;
}