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

int main() {
    int C[30] = {};
    for (int i = 0; i < 26; i++) {
        cin >> C[i];
    }

    string s = "hewrd";
    long long ans = 1;
    for (auto& c : s)
        ans *= C[c - 'a'];

    int s1, s2;
    s1 = C['o' - 'a'] / 2;
    s2 = C['o' - 'a'] - s1;
    ans *= s1 * s2;

    int MAX = 0;
    if (C['l' - 'a'] < 3)
        MAX = 0;
    else {
        for (int i = 2; i < C['l' - 'a']; i++) {
            MAX = max(MAX, i * (i - 1) / 2 * (C['l' - 'a'] - i));
        }
    }
    ans *= MAX;

    cout << ans << endl;
}