#include <iostream>
#include <iterator>
#include <algorithm>
#include <vector>
using namespace std;
void main()
{
	istream_iterator< int > input( cin );
	istream_iterator< int > end_of_stream;
	vector<int> vec;
	
	copy ( input, end_of_stream, inserter( vec, vec.begin() ));
	sort( vec.begin(), vec.end());
	
	ostream_iterator< int > output( cout, " " );
	unique_copy( vec.begin(), vec.end(), output );
}