# include<iostream> # include<cstring> using namespace std; int main(){ char a[1500],b[5]={'h','e','l','l','o'}; int n,c=0; cin>>a; n=strlen(a); for(int i=0;i<n;i++){ if(a[i]==b[c]){ c++; } } if(c==5){ cout<<"YES"; } else{ cout<<"NO"; } return 0; }