#include<bits/stdc++.h> using namespace std; int main(){ string a; string s = "hello"; cin >> a; int al; int c=0; int k=0; al = a.size(); for (int i =0;i < al;i++){ if(a[i] == s[k]){ c++; k++; if( c == 5){ cout << "YES"; return 0; } } } cout << "NO"; return 0; }