using System;
using System.IO;
using System.Text;
using System.Linq;
using System.Diagnostics;
using System.Collections.Generic;
using Enu = System.Linq.Enumerable;

class Program
{
    static readonly string helloworld = "helloworld";

    void Solve()
    {
        var count = reader.IntArray(26);
        var need = new int[26];
        helloworld.ToList().ForEach(c => need[c - 'a']++);
        if (helloworld.Any(c => count[c - 'a'] < need[c - 'a']))
        {
            Console.WriteLine(0);
            return;
        }
        long ans = 1;
        int countL = count['l' - 'a'];
        int countO = count['o' - 'a'];

        for (int LL = 2; LL < countL; LL++)
            for (int OL = 1; OL < countO; OL++)
            {
                int LR = countL - LL;
                int OR = countO - OL;
                long curr = LL * (LL - 1) / 2 * LR * OR * OL;
                ans = Math.Max(ans, curr);
            }

        helloworld.Where(c => need[c - 'a'] == 1).ToList().ForEach(c => ans *= count[c - 'a']);
        Console.WriteLine(ans);
    }





    static void Main() { new Program().Solve(); }
    Reader reader = new Reader(Console.In);
    class Reader
    {
        private readonly TextReader reader;
        private readonly char[] separator = { ' ' };
        private readonly StringSplitOptions removeOp = StringSplitOptions.RemoveEmptyEntries;
        private string[] A = new string[0];
        private int i;

        public Reader(TextReader r) { reader = r; }
        public bool HasNext() { return Enqueue(); }
        public string String() { return Dequeue(); }
        public int Int() { return int.Parse(Dequeue()); }
        public long Long() { return long.Parse(Dequeue()); }
        public double Double() { return double.Parse(Dequeue()); }
        public int[] IntLine() { var s = Line(); return s == "" ? new int[0] : Array.ConvertAll(Split(s), int.Parse); }
        public int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
        public int[][] IntGrid(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
        public string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
        public string Line() { return reader.ReadLine().Trim(); }
        private string[] Split(string s) { return s.Split(separator, removeOp); }
        private bool Enqueue()
        {
            if (i < A.Length) return true;
            string line = reader.ReadLine();
            if (line == null) return false;
            if (line == "") return Enqueue();
            A = Split(line);
            i = 0;
            return true;
        }
        private string Dequeue() { Enqueue(); return A[i++]; }
    }
}