#include<bits/stdc++.h> using namespace std; char a[51]="hello",b[51]; int main(){ int k=0; cin>>b; int len=strlen(b); for (int i=0;i<len;i++) { if(b[i]==a[k]){ k++; if(k==5){ cout<<"YES"; return 0; } } } if(k<5) cout<<"NO"; return 0; }