#include<bits/stdc++.h> using namespace std; int main(){ char a1[1501]={},a2[10]="hello"; cin>>a1; int q=0; for(int i=0;a1[i]!='\0';i++){ if(a1[i]==a2[q]) q++; if(q==5){ cout<<"YES"<<endl; return 0; } } if(q<5){ cout<<"NO"; } return 0; }