# include<iostream> # include<cstring> using namespace std; int main(){ char a[11501],b[5]={'h','e','l','l','o'}; cin>>a; int s=0; for(int i=0;i<strlen(a);i++){ if(a[i]==b[s]){ s++; } }if(s==5){ cout<<"YES"; }else cout<<"NO"; return 0; }