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

#define int long long

#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,f,n) for(int i=(f);i<(n);i++)
#define pb push_back
#define all(v) (v).begin(),(v).end()
typedef vector<int>vint;
typedef pair<int,int>pint;
typedef vector<pint>vpint;

string t="helloworld";

signed main(){
    int ans=1;
    rep(i,26){
        char c='a'+i;
        int x;cin>>x;
        if(find(all(t),c)==t.end())continue;
        int tmp=count(all(t),c);
        if(tmp==1)ans*=x;
        else if(c=='l'){
            int ma=0;
            for(int i=2;i<x;i++){
                int y=x-i;
                ma=max(ma,i*(i-1)/2*y);
            }
            ans*=ma;
        }
        else if(c=='o'){
            int ma=0;
            for(int i=1;i<x;i++){
                int y=x-i;
                ma=max(ma,i*y);
            }
            ans*=ma;
        }
    }
    cout<<ans<<endl;
    return 0;
}