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++]; } } }