#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

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