#include <iostream>
#include <map>
using namespace std;
int main(){
	map<char, int> mp;
	for (int i = 0; i < 26; i++){
		cin >> mp['a' + i];
	}
	unsigned long long ans = 1;
	ans *= mp['h'];
	ans *= mp['e'];
	ans *= mp['o'] / 2;
	ans *= mp['w'];
	ans *= (mp['o'] + 1) / 2;
	ans *= mp['r'];
	ans *= mp['d'];
	int mx = 0;
	for (int i = 0; i <= mp['l']; i++){
		mx = max(mx, i * (i - 1) / 2 * (mp['l'] - i));
	}
	ans *= mx;
	cout << ans << endl;
}