#include <string>
#include <iostream>
#include <fstream>

using namespace std;

int read_file(string ss[], string ns[], double as[])
{ ifstream in;
  in.open("elements.txt");
  if (in.fail())
  { cout << "Could not open the file\n";
    exit(1); }

  int maxatno;
  for (int atno = 1; atno < 150; atno += 1)
  { in >> ss[atno] >> ns[atno] >> as[atno];
    if (in.fail())
      break;
    maxatno = atno; }

  in.close();
  return maxatno; }



int find_element(string wanted, string ss[], int max)
{ for (int i = 1; i <= max; i += 1)
    if (ss[i] == wanted)
      return i;
  return -1; }



int main()
{ string symbols[150], names[150];
  double atwts[150];
  const int maxatno = read_file(symbols, names, atwts);

  double total = 0.0;
  bool ok = true;
  while (true)
  { string wanted;
    cin >> wanted;
    if (wanted == ".")
      break;

    int position = find_element(wanted, symbols, maxatno);

    if (position >= 0)
    { cout << "Symbol: " << symbols[position] << 
              ", Name: " << names[position] << 
              ", Atwt = " << atwts[position] << "\n"; 
      total += atwts[position]; }
    else
    { cout << "Couldn't find \"" << wanted << "\"\n";
      ok = false; } }

  if (ok)
    cout << "\nMolecular weight = " << total << "\n"; }