#include <iostream>
#include <sstream>
#include <iomanip>

using namespace std;

using bigint = signed long long int;

string add_thousands_separator(bigint n, char ts = ' ')
{
  string s = to_string(n);

  for (int i = s.size()-3; i > (n < 0); i -= 3)
  {
    s.insert(i, 1, ts);
  }
  return s;
}

int main()
{
  bigint i;
   
  cout << "Enter numbers to format, finish with Ctrl-D" << endl;  
  while ( cin >> i )
  {
     cout << "'" << add_thousands_separator(i) << "' == \""
          << add_thousands_separator(i, '.') << '"' << endl;
  }
  cout << "Done." << endl;
   
  return 0;
}