#include <bits/stdc++.h>
using namespace std;
struct cww{cww(){ios::sync_with_stdio(false);cin.tie(0);}}star;
#define all(c) (c).begin(), (c).end()
#define rall(c) (c).rbegin(), (c).rend()
#define vv(type, c, m, n, i) vector<vector<type>> c(m, vector<type>(n, i))
#define mat(type, c, m, n) vector<vector<type>> c(m, vector<type>(n));for(auto& r:c)for(auto& i:r)cin>>i;
#define rep(i,a,n) for(int i=(a), i##_len=(n); i<i##_len; ++i)
#define rrep(i,a,n) for(int i=(a), i##_len=(n); i>i##_len; --i)
#define each(x,y) for(auto &(x):(y))
#define var(type, ...)type __VA_ARGS__;Scan(__VA_ARGS__);
template<typename T> void Scan(T& t) { cin >> t; }
template<typename First, typename...Rest>void Scan(First& first, Rest&...rest) { cin >> first; Scan(rest...); }
#define vec(type, c, n) vector<type> c(n);for(auto& i:c) cin>>i;
#define len(x) ((int)(x).size())
#define mp make_pair
#define eb emplace_back
#define em emplace
#define pb pop_back
#define fi first
#define se second
#define get(a, i) get<i>(a)
#define bit_count __builtin_popcount
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<double> vd;
typedef vector<long long> vll;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef pair<int, int> pii;
#define mini min_element
#define maxi max_element
#define sum accumulate
#define chmax(a,b) if(a<b)a=b
#define chmin(a,b) if(a>b)a=b
template <class T> inline void print(T t){cout << t << "\n";}
template <class H, class... T> inline void print(H h, T... t){cout << h << " ";print(t...);}
inline ll comb(int y, int x) {
	if (x == 0 || y == x) return 1;
	if (x < 0 || y < x) return 0;
    ll t = 1;
    ll maxt = ll(1e15) + 1;
    rep(i, 1, min(x, y - x) + 1) {
    	t = t * (y + 1 - i) / i;
    	if (t > maxt)
    		return maxt;
    }
    return t;
}
ll solve() {
	int c;
	vi v;
	map<char, int> m;
	m['h'] = 1;
	m['e'] = 1;
	m['l'] = 3;
	m['o'] = 2;
	m['w'] = 1;
	m['r'] = 1;
	m['d'] = 1;
	ll ans = 1;
	each(a, string("abcdefghijklmnopqrstuvwxyz")) {
		cin >> c;
		int t;
		if (m.find(a) != m.end()) {
			if (c < m[a]) {
				return 0;
			}
			if (c > m[a]) {
				if (a == 'o') {
					t = c / 2;
					ans *= t * (c - t);
				} else if (a == 'l') {
					t = 1;
					rep(i, 1, c - 1) {
						chmax(t, comb(c - i, 2) * i);
					}
					ans *= t;
				} else {
					ans *= c;
				}
			}
		}
	}
	return ans;
}
int main() {
	print(solve());
	return 0;
}