import java.io.IOException;
import java.util.Scanner;

public class Yukicoder73 {

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

	}

	static long cmb(int n, int m) {
		long c = 1;
		m = (n - m < m ? n - m : m);
		for (int ns = n - m + 1, ms = 1; ms <= m; ns++, ms++) {
			c *= ns;
			c /= ms;
		}
		return c;
	}
}