#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) for(int i = (n) - 1; (i) >= 0; --i)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
#define MOD 1000007
#define INF 100000000
using namespace std;
typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PI;


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