c#include <bits/stdc++.h> using namespace std; int main(){ cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(false); string N; cin >> N; if(N.size() == 7 && N.substr(0, 3) == "555"){ cout << "YES" << "\n"; }else{ cout << "NO" << "\n"; } return 0; }