#include<bits/stdc++.h> using namespace std; int main() { //500位 //hello //1 char a[1600]; cin >> a; char b[] = {'h','e','l','l','o'}; int count = 0; for (int i = 0; a[i] ; i++ ) { if (a[i] == b[count]) { count++; } } count == 5 ? cout << "YES" << endl : cout << "NO" << endl; }