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

struct element
{   string name, symbol;
    double weight; };

element table[105];

element make(string s, string n, double w)
{   element r;
    r.symbol=s;
    r.name=n;
    r.weight=w;
    return r; }

void print(element e)
{ cout << e.name
       << " (" << e.symbol 
       << ") w=" << e.weight << "\n"; }

void read()
{  ifstream efile("elements.txt");
   if (efile.fail())
   {  cerr << "Can't open 'elements.txt'\n";
      exit(1); }
   for (int i=1; i<=104; i+=1)
   { string sy, nm;
     double wt;
     efile >> sy >> nm >> wt;
     if (efile.fail())
        break;
     table[i]=make(sy, nm, wt); }
   efile.close(); }

struct inputthing
{ string formula;
  int pos; };

void read(inputthing & x, string prompt="")
{ cout << prompt;
  cin >> x.formula;
  x.pos=0; }

string combine(char a, char b=0)
{ string s="";
  s+=a;
  if (b!=0)
    s+=b;
  return s; }

char nextchar(inputthing & w)
{ if (w.pos>=w.formula.length())
    return '*';
  char c=w.formula[w.pos];
  w.pos+=1;
  return c; }

void putcharback(inputthing & w)
{ w.pos-=1; }

string nextsymbol(inputthing x)
{ char c1=nextchar(x);
  if (c1=='*')
    return "*";
  if (c1>='A' && c1<='Z')
  { char c2=nextchar(x);
    if (c2>='a' && c2<='z')
      return combine(c1, c2);
    putcharback(x);
    return combine(c1); }
  else if (c1>='0' && c1<='9')
  { string num=combine(c1);
    char c2=nextchar(x);
    while (c2>='0' && c2<='9')
    { num+=c2;
      c2=nextchar(x); }
    putcharback(x);
    return num; } }


void test()
{  print(table[11]);
   print(table[57]);
   print(table[103]); }

void main()
{ read();
  inputthing reader;
  read(reader, "formula: ");
  while (true)
  { string s = nextsymbol(reader);
    cout << "'" << s << "'\n";
    if (s=="*")
      break; } }