#include <iostream>
#include <cmath>
#include <cstring>

using namespace std;

int main()
{
	int n;
	cout << "enter n: " << endl;
	cin >> n;

	char str1[100];

	char a[100][100];

	for (int i = 0; i <= n; i++)
	{
		cin.getline(str1, 100);
			for (int j = 0; j < strlen(str1); j++)
			{
				a[i][j] = str1[j];
			}

	}

	for (int i = n; i > 0; i--)
	{
		bool hasOnlySmallLetters = true;
		for (int j = 0; str1[j]; j++)
		{
			if (a[i][j] < 'a' || a[i][j] > 'z')
			{
				hasOnlySmallLetters = false;
			}
		}

		if (hasOnlySmallLetters)
		{
			for (int j = 0; str1[j]; j++)
			{
				cout << a[i][j];
			}
		}
	}


	return 0;
}