import std.stdio, std.conv, std.math, std.string, std.range, std.array,
       std.algorithm;

//return ULL nCr {(n,r)|n,r ∈ (int)}
ulong combination(int n, int r){
	if (r == 0) return 1;
	if (r > n/2) return combination(n,n-r);
	ulong ret=1;
	for (int i = 1; i <= r; ++i)
		ret = ret*(n-i+1)/i;
	return ret;
}

void main(){
  
  int[] a;
  a.length = 26;
  foreach(immutable int i; 0 .. 26) {
    a[i] = readln().strip().to!int();
  }

  ulong l;
  foreach(immutable int i; 1 .. a['l'-'a']-1) {
    l = max((combination(a['l'-'a']-i, 2) * i).to!int, l);
  }

  ulong o;
  if(a['o'-'a']%2 == 1) {
    o = (a['o'-'a']/2 + 1) * (a['o'-'a']/2);
  } else {
    o = (a['o'-'a']/2)^^2;
  }

  (a['h'-'a'].to!ulong * a['e'-'a'] * l * o * a['w'-'a'] * a['r'-'a'] * a['d'-'a']).writeln();
}