#include <stdio.h>

int main ( void )
{
   int i, number;
   for ( i = 0; i < 3; ++i )
   {
      fputs ( "page number(s) ? ", stdout );
      fflush ( stdout );
      while ( scanf ( "%d", &number ) == 1 )
      {
         printf ( "number = %d\n", number );
      }
      rewind ( stdin );
   }
   return 0;
}

/* my output
page number(s) ? 12 23 34 45^Z
number = 12
number = 23
number = 34
number = 45
page number(s) ? 78 89 90^Z
number = 78
number = 89
number = 90
page number(s) ? 1 2 3^Z
number = 1
number = 2
number = 3
*/

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <iterator>
using namespace std;
 
int main()
{
	// create a string vector
	// inialized by all the words from standard input
	vector<string> v((istream_iterator<string>(cin)),
		             istream_iterator<string>());
 
	//sort elements
	sort( v.begin(), v.end() );
 
	//print all elements ignoring subsquent duplicates
	unique_copy( v.begin(), v.end(),
		         ostream_iterator<string>(cout, "\n") );
 
 
	return 0;
}