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

#define int long long
#define rep(i,l,r) for(int i=(int)(l);i<(int)(r);i++)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)x.size())
template<class T>bool chmax(T &a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T &a,T b){if(a>b){a=b;return 1;}return 0;}

typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int inf = 1LL<<60;
const int mod = 1e9 + 7;
const double eps = 1e-9;

/*{
  }*/

signed main(){
  vi c(26);
  rep(i, 0, 26) cin >> c[i];

  int ans = c['l'] > 2;
  rep(i, 2, c['l'-'a']){
    rep(j, 1, c['o'-'a']){
      int k = c['l'-'a'] - i;
      int l = c['o'-'a'] - j;
      int tmp = i*(i-1)/2 * j * k * l;
      chmax(ans, tmp);
    }
  }

  ans *= c['h'-'a'];
  ans *= c['e'-'a'];
  ans *= c['w'-'a'];
  ans *= c['r'-'a'];
  ans *= c['d'-'a'];

  cout << ans << endl;

  return 0;
}