import java.io.IOException;
import java.util.Arrays;
import java.util.InputMismatchException;

public class Main {
	long[][] dp;

	long combi(int n, int k) {
		if (k == 0 || n == k) {
			return 1;
		}
		if (n < 0 || k < 0) {
			return 0;
		}
		if (0 <= dp[n][k]) {
			return dp[n][k];
		}
		return combi(n - 1, k) + combi(n - 1, k - 1);
	}

	void run() {
		MyScanner sc = new MyScanner();
		int[] k = new int['z' - 'a' + 1];
		int n = k.length;
		for (int i = 0; i < n; i++) {
			k[i] = sc.nextInt();
		}

		long ans = 1;
		char[] hello = "hewrd".toCharArray();
		for (int i = 0; i < hello.length; i++) {
			ans *= k[hello[i] - 'a'];
		}

		long max = 0;
		dp = new long[101][101];
		for (int i = 0; i < 101; i++) {
			Arrays.fill(dp[i], -1);
		}
		for (int l = 2; l < k['l' - 'a']; l++) {
			for (int o = 1; o < k['o' - 'a']; o++) {
				long tmp = 1;
				tmp *= combi(l, 2);
				tmp *= combi(k['l' - 'a'] - l, 1);
				tmp *= combi(o, 1);
				tmp *= combi(k['o' - 'a'] - o, 1);
				max = Math.max(max, tmp);
			}
		}
		ans *= max;
		System.out.println(max);
	}

	public static void main(String[] args) {
		new Main().run();
	}

	public void mapDebug(int[][] a) {
		System.out.println("--------map display---------");
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < a[i].length; j++) {
				System.out.printf("%3d ", a[i][j]);
			}
			System.out.println();
		}
		System.out.println("----------------------------" + '\n');
	}

	class MyScanner {
		int read() {
			try {
				return System.in.read();
			} catch (IOException e) {
				throw new InputMismatchException();
			}
		}

		boolean isSpaceChar(int c) {
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}

		boolean isEndline(int c) {
			return c == '\n' || c == '\r' || c == -1;
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		int[] nextIntArray(int n) {
			int[] array = new int[n];
			for (int i = 0; i < n; i++)
				array[i] = nextInt();
			return array;
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		long[] nextLongArray(int n) {
			long[] array = new long[n];
			for (int i = 0; i < n; i++)
				array[i] = nextLong();
			return array;
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		double[] nextDoubleArray(int n) {
			double[] array = new double[n];
			for (int i = 0; i < n; i++)
				array[i] = nextDouble();
			return array;
		}

		String next() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = read();
			} while (!isSpaceChar(c));
			return res.toString();
		}

		String[] nextStringArray(int n) {
			String[] array = new String[n];
			for (int i = 0; i < n; i++)
				array[i] = next();

			return array;
		}

		String nextLine() {
			int c = read();
			while (isEndline(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = read();
			} while (!isEndline(c));
			return res.toString();
		}
	}
}