#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000

int main(){
	
	vector<long long> c(26);
	rep(i,26)cin>>c[i];
	
	long long ans = 1LL;
	ans *= c['h'-'a'];
	ans *= c['e'-'a'];
	ans *= c['w'-'a'];
	ans *= c['r'-'a'];
	ans *= c['d'-'a'];
	
	{
		long long temp = c['o' - 'a'];
		long long m = 0;
		rep(i,temp){
			m = max(m,i * (temp-i));
		}
		ans *= m;
	}
	
	{
		long long temp = c['l' - 'a'];
		long long m = 0;
		rep(i,temp){
			m = max(m,((i * (i-1)) / 2) * (temp-i));
		}
		ans *= m;
	}
	
	cout<<ans<<endl;
	
	return 0;
}