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

void main()
{
  auto ci = iota(26).map!(i => readln.chomp.to!long).array;

  long r = 1;
  r *= ci['h' - 'a'];
  r *= ci['e' - 'a'];
  r *= ci['w' - 'a'];
  r *= ci['r' - 'a'];
  r *= ci['d' - 'a'];
  r *= calc_o(ci['o' - 'a']);
  r *= calc_l(ci['l' - 'a']);

  writeln(r);
}

long calc_o(long n)
{
  if (n < 2)
    return 0;
  else
    return iota(1, n).map!(x => x * (n - x)).reduce!(max);
}

long calc_l(long n)
{
  if (n < 3)
    return 0;
  else
    return iota(2, n).map!(x => x * (x - 1) / 2 * (n - x)).reduce!(max);
}