#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

signed main(){
  vector< int > cnt( 256 );
  for( int i = 'a'; i <= 'z'; ++i )
    cin >> cnt[ i ];
  if( cnt[ 'h' ] < 1 or cnt[ 'e' ] < 1 or cnt[ 'l' ] < 3 or cnt[ 'o' ] < 2 or cnt[ 'w' ] < 1 or cnt[ 'r' ] < 1 or cnt[ 'd' ] < 1 )
    cout << 0 << endl, exit( 0 );
  ll ans = 1;
  ans *= cnt[ 'h' ];
  ans *= cnt[ 'e' ];
  ans *= cnt[ 'w' ];
  ans *= cnt[ 'r' ];
  ans *= cnt[ 'd' ];
  ll x = 0;
  for( int i = 2; cnt[ 'l' ] - i >= 1; ++i ){
    x = max( x, 1LL * ( cnt[ 'l' ] - i ) * i * ( i - 1 ) / 2 );
  }
  ans *= x;
  x = 0;
  for( int i = 1; cnt[ 'o' ] - i >= 1; ++i ){
    x = max( x, 1LL * ( cnt[ 'o' ] - i ) * i / 2 );
  }
  ans *= x;
  cout << ans << endl;
  return 0;
}