#include<bits/stdc++.h>
using namespace std;
using ll = long long;

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl

int ctoi(char c) {
    ll i = c - 'a';
    return i;
}

ll f(ll l){
    ll ma = -1;
    ll ma_x = -1;

    // 右の l にx個使う
    FOR(x, 1, l-1){
        ll num = (l-x)*(l-x-1)*x/2;
        if(num > ma){
            ma = num;
            ma_x = x;
        }
    }
    return ma;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    vector<ll> A(26);
    FOR(i, 0, 26){
        cin >> A.at(i);
    }

    ll ans = 1;
    ans *= A[ctoi('h')];
    ans *= A[ctoi('e')];
    ans *= A[ctoi('w')];
    ans *= A[ctoi('r')];
    ans *= A[ctoi('d')];

    // o
    ll o_0 = A[ctoi('o')] / 2;
    ll o_1 = A[ctoi('o')] - o_0;
    ans *= o_0;
    ans *= o_1;

    // l
    ll l = A[ctoi('l')];
    if(l==3){
        p(ans);
    }else if(l<3){
        p(0);
    }
    else{
        // l > 3
        ll ma = f(l);
        p(ans * ma);
    }
    
    return 0;
}