#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

    
int main() {
ios_base::sync_with_stdio(0); cin.tie(0); 
string S;cin>>S;
ll k=S[0]-'0';
if(k==4||k==5) {
    cout<<"Yes"<<endl;
}
else cout<<"No"<<endl;
}