#include<iostream> using namespace std; int main(){ char a[1500],hello[5]={'h','e','l','l','o'}; cin>>a; int i,j=0; for(i=0;i<5;i++){ while(a[j]!=hello[i]){ if(a[j]=='\0'){ cout<<"NO"; return 0; } j++; } j++; } cout<<"YES"; return 0; }