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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    vector<long long> C(26);
    for(auto &c : C) cin >> c;

    long long answer = 1;
    answer *= C.at('d'-'a');
    answer *= C.at('e'-'a');
    answer *= C.at('h'-'a');
    answer *= C.at('w'-'a');
    answer *= C.at('r'-'a');
    answer *= C.at('o'-'a')/2;
    answer *= (C.at('o'-'a')+1)/2;

    int maxl = 0;
    for(int i=1; i<=C.at('l'-'a')-2; i++){
        int left = C.at('l'-'a')-i;
        maxl = max(maxl,left*(left-1)/2*i);
    }    
    answer *= maxl;
    cout << answer << endl;
}