#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <queue>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

static const double EPS = 1e-8;
static const double PI = 4.0 * atan(1.0);
static const double PI2 = 8.0 * atan(1.0);

#define REP(i,n)	for(int i=0;i<(int)n;++i)
#define ALL(c)		(c).begin(),(c).end()
#define CLEAR(v)	memset(v,0,sizeof(v))
#define MP(a,b)		make_pair((a),(b))
#define ABS(a)		((a)>0?(a):-(a))
#define FOR(i,s,n)	for(int i=s;i<(int)n;++i)

int cnt[256];

int main(int argc, char **argv) {
	REP(i, 'z' - 'a' + 1) cin >> cnt['a' + i];
	ll h = cnt['h'], e = cnt['e'], l = cnt['l'], o = cnt['o'], w = cnt['w'], r = cnt['r'], d = cnt['d'];
	ll res = h * e * w * r * d;
	res *= (o + 1) / 2 * (o / 2);
	ll lm = 0;
	REP(i, l - 2) lm = max(lm, ll(i + 2) * (i + 1) / 2 * (l - 2 - i));
	res *= lm;
	cout << res << endl;
	return 0;
}