#define _USE_MATH_DEFINES

#include <iostream>
#include <iomanip>

#include <algorithm>
#include <cmath>

#include <string>
#include <list>
#include <queue>
#include <vector>
#include <complex>
#include <set>

/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

int main(void){
    std::cin.tie(0); 
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed;//
    //cout << setprecision(6);//
	
	LL C[26];
	rep(i,26){
		cin>>C[i];
	}
	LL ans = 1;
	LL ama = 0;
	LL big = -1;
	LL tbig = 0;
	if(C['e'-'a'] < 1){P(0);return 0;}
	else{ans *= C['e'-'a'];}
	if(C['h'-'a'] < 1){P(0);return 0;}
	else{ans *= C['h'-'a'];}
	if(C['r'-'a'] < 1){P(0);return 0;}
	else{ans *= C['r'-'a'];}
	if(C['w'-'a'] < 1){P(0);return 0;}
	else{ans *= C['w'-'a'];}
	if(C['o'-'a'] < 2){P(0);return 0;}
	else{
		ama = C['o'-'a']-2;
		ans *= (1+ama/2)*(1+ama-ama/2);
	}
	if(C['l'-'a'] < 3){P(0);return 0;}
	else{
		ama = C['l'-'a'] - 3 ;
		for(int k=0;k<=ama;++k){
			tbig = ((k+2)*(k+1)/2) * (ama-k+1);
			if(big == -1 || big < tbig){
				big = tbig;
			}
		}
		ans *= big;
	}
	P(ans);
	return 0;
}