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

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