#include <set>
#include <iostream>
#include <string>
using namespace std;
int main()
{
	set<string> my_set;
	for (int i = 0; i < 10; i++)
	{
		string temp;
		cin >> temp;
		my_set.insert(temp);
	}



	for (auto i = my_set.begin(); i != my_set.end(); i++)
	{
		cout << *i << endl;
	}
    return 0;
}