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