#include <iostream>
using namespace std;

typedef long long ll;

ll func_for_o(ll o_cnt) {
    return o_cnt / 2 * (o_cnt - o_cnt / 2);
}

int main() {
    ll h, e, l, o, w, r, d;
    for (int i = 0; i < 26; i++) {
        ll c;
        cin >> c;
        switch ('a' + i) {
        case 'h': h = c; break;
        case 'e': e = c; break;
        case 'l': l = c; break;
        case 'o': o = c; break;
        case 'w': w = c; break;
        case 'r': r = c; break;
        case 'd': d = c; break;
        default: break;
        }
    }

    ll temp_res = h * e * func_for_o(o) * w * r * d,
       res = 0;
    // l だけ全探索
    for (ll left_l = 2; left_l <= l - 1; left_l++) {
        ll l_pattern = left_l * (left_l - 1) / 2 * (l - left_l);
        res = max(res, temp_res * l_pattern);
    }
    cout << res << endl;

    return 0;
}