#include<iostream> #include<cstring> char a[1500]; using namespace std; int main(){ char b[6]="hello"; int count=0; cin>>a; for(int i=0;a[i]!='\0';i++){ if(a[i]==b[count]){ count++; } } if(count==5){ cout<<"YES"; } else{ cout<<"NO"; } return 0; }