#include <bits/stdc++.h>

#define show(x) cout << #x << " = " << x << endl

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
    os << "sz=" << v.size() << "\n[";
    for (const auto& p : v) {
        os << p << ",";
    }
    os << "]\n";
    return os;
}

template <typename S, typename T>
ostream& operator<<(ostream& os, const pair<S, T>& p)
{
    os << "(" << p.first << "," << p.second
       << ")";
    return os;
}


constexpr ll MOD = 1e9 + 7;

template <typename T>
constexpr T INF = numeric_limits<T>::max() / 100;

int alpha[26];

int main()
{
    ll num = 1;
    for (ll i = 0; i < 26; i++) {
        cin >> alpha[i];
    }
    num *= alpha['h' - 'a'];
    num *= alpha['e' - 'a'];
    num *= alpha['w' - 'a'];
    num *= alpha['r' - 'a'];
    num *= alpha['d' - 'a'];
    num *= (alpha['o' - 'a'] / 2) * ((alpha['o' - 'a'] + 1) / 2);

    ll maxi = 0;
    ll l = alpha['l' - 'a'];
    for (int i = 2; i < l; i++) {
        maxi = max(i * (i - 1) / 2 * (l - i), maxi);
    }
    num *= maxi;

    cout << num << endl;

    return 0;
}