# include<iostream> using namespace std; int main(){ char f[6]="hello", a[1501]; int n = 0, l = 0; cin>>a; while(a[l]!='\0')l++; for(int i = 0; i < l; i++){ if(a[i]==f[n]){ n++; } } if(n>=5){ cout<<"YES"; }else{ cout<<"NO"; } return 0; }