package no073;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] c = new int[128];
		for(int i=0;i<26;i++) {
			c[i + 'a'] = sc.nextInt();
		}
		long num = 1;
		num *= c['h'] * c['e'] * c['w'] * c['r'] * c['d'];
		int o = c['o'];
		num *= (o/2) * (o-o/2);
		int l = c['l'];
		if (l == 0) {
			num = 0;
		}else{
			long max = 0;
			for(int i=1;i<l;i++) {
				max = Math.max(max,i*(i-1)/2*(l-i));
			}
			num *= max;
		}
		System.out.println(num);
	}

}