#include <bits/stdc++.h>
using namespace std;

#define int long long
template<typename T>
void chmax(T &a,T b){
  if(a<b)a=b;
}

signed main(){
  vector<int> v(26);
  for(int i=0;i<26;i++)cin>>v[i];
  int ans=1;
  ans*=v['h'-'a'];
  ans*=v['e'-'a'];
  ans*=v['w'-'a'];
  ans*=v['r'-'a'];
  ans*=v['d'-'a'];
  int a=v['l'-'a'];
  int m=0;
  for(int i=1;i<=a-2;i++)chmax(m,i*(a-i)*(a-i-1)/2);
  ans*=m;
  int b=v['o'-'a'];
  ans*=(b/2)*(b-b/2);
  cout<<ans<<endl;
}