#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
#include <iomanip>
using namespace std;
#define INF 1e9
#define PI acos(-1)
typedef long long ll;

map<char, ll> cnt;
ll ans;

int main() {
	string hello = "helowrd";

	for (char i = 'a'; i <= 'z'; i++) {
		int sub; cin >> sub;
		cnt[i] = sub;
	}
	
	ans = 1;
	for (int i = 0; i < 7; i++) {
		char a = hello[i];
		if (a == 'l') {
			ll c = 0;
			for (int j = 0; j < cnt['l'] + 1; j++) {
				ll tmp = 1, x = j, y = cnt['l'] - x;
				tmp *= x; tmp *= y*(y - 1) / 2;
				c = max(c, tmp);
			}
			ans *= c;
		}
		else if (a == 'o') {
			ll x = cnt['o'] / 2, y=cnt['o']-x;
			ans *= (x*y);
		}
		else ans *= cnt[a];
	}

	cout << ans << endl;

	return 0;
}