#include<iostream>
#include<string>
 
using namespace std;
 
typedef struct Element {
	int length;
	string data;
} Words;
 
 
void Swap(Words &x, Words &y, Words &t)
{
	if (x.length == y.length)
	{
		if (x.data.compare(y.data) < 0)
		{
			return;
		}
	}
 
	t = x;
	x = y;
	y = t;
}
 
 
int Partition(Words list[], int left, int right)
{
	Words pivot, temp;
	int low, high;
 
	low = left;
	high = right + 1;
	pivot = list[left];
	do {
		do
			low++;
		while (low <= right && list[low].length < pivot.length);
		do
			high--;
		while (high >= left && list[high].length > pivot.length);
 
		if (low < high)
			Swap(list[low], list[high], temp);
	} while (low < high);
 
	Swap(list[left], list[high], temp);
 
	return high;
}
 
void Quick_sort(Words list[], int left, int right)
{
	if (left < right)
	{
		int q = Partition(list, left, right);
		Quick_sort(list, left, q - 1);
		Quick_sort(list, q + 1, right);
	}
}
 
 
 
int main(void)
{
	int N;
	string temp = "";
 
	cin >> N;
 
	Words *List = new Words[N];
 
	for (int i = 0; i < N; i++)
	{
		cin >> List[i].data;
		List[i].length = List[i].data.length();
		if (List[i].length > 50)
		{
			return 0;
		}
	}
 
	Quick_sort(List, 0, N - 1);
 
	for (int i = 0; i < N; i++)
	{
		if (temp != List[i].data)
		{
			temp = List[i].data;
		}
		else
			continue;
 
		cout << List[i].data << "\n";
	}
 
	delete[] List;
 
	return 0;
}

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