using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProgrammingContest
{
    class MainClass
    {
        Scanner sc;
        static void Main(string[] args)
        {
            new MainClass().Solve();
        }

        void Solve()
        {
#if DEBUG
            string backPath = "..";
            char dirSep = System.IO.Path.DirectorySeparatorChar;
            string inFilePath = backPath + dirSep + backPath + dirSep + "in.txt";
            sc = new Scanner(new System.IO.StreamReader(inFilePath));
#else
            sc = new Scanner();
#endif

            int[] cnt = new int[26];
            for (int i = 0; i < 26; i++)
            {
                cnt[i] = sc.NextInt;
            }
            int d = 0, e = 0, h = 0, l = 0, o = 0, r = 0, w = 0;
            for (int i = 0; i < 26; i++)
            {
                char c = (char)('a' + i);
                if (c == 'd') d = cnt[i];
                else if (c == 'e') e = cnt[i];
                else if (c == 'h') h = cnt[i];
                else if (c == 'l') l = cnt[i];
                else if (c == 'o') o = cnt[i];
                else if (c == 'r') r = cnt[i];
                else if (c == 'w') w = cnt[i];
            }
            if (d < 1 || e < 1 || h < 1 || l < 3 || o < 2 || r < 1 || w < 1)
            {
                Write(0);
                return;
            }
            long ans = 0;
            for (int leftL = 2; leftL < l; leftL++)
            {
                int rightL = l - leftL;
                for (int leftO = 1; leftO < o; leftO++)
                {
                    int rightO = o - leftO;
                    long buf = 1L * h * e * (leftL * (leftL - 1) / 2) * leftO * w * rightO * r * rightL * d;
                    ans = Math.Max(ans, buf);
                }
            }
            Write(ans);  
        }
        void Write(object val)
        {
            Console.WriteLine(val.ToString());
        }
        void Write(string format, params object[] vals)
        {
            Console.WriteLine(format, vals);
        }
    }
    class Scanner
    {
        Queue<String> buffer;
        char[] sep;
        System.IO.TextReader reader;
        public Scanner(System.IO.TextReader reader = null)
        {
            this.buffer = new Queue<string>();
            this.sep = new char[] { ' ' };
            this.reader = (reader ?? Console.In);
        }
        private void CheckBuffer()
        {
            if (this.buffer.Count == 0 && this.reader.Peek() >= 0)
            {
                string[] sreArray = this.reader.ReadLine().Split(this.sep);
                foreach (String elStr in sreArray)
                {
                    this.buffer.Enqueue(elStr);
                }
            }
        }

        public String Next
        {
            get
            {
                this.CheckBuffer();
                return this.buffer.Dequeue();
            }
        }

        public int NextInt
        {
            get
            {
                return int.Parse(this.Next);
            }
        }
        public double NextDouble
        {
            get
            {
                return double.Parse(this.Next);
            }
        }

        public long NextLong
        {
            get
            {
                return long.Parse(this.Next);
            }
        }
        public bool IsEmpty
        {
            get
            {
                this.CheckBuffer();
                return this.buffer.Count == 0;
            }
        }
    }
}