#include<iostream> #include<cstring> #include<cstdio> using namespace std; int main(){ char a[1511]; int count = 0; char b[5] = {'h','e','l','l','o'}; cin >> a; for(int i = 0;a[i] != '\0';++i) { if(a[i] == b[count]) count++; } if(count == 5) cout << "YES"<< endl; else cout <<"NO" << endl; return 0; }