#include<iostream>
using namespace std;
int main()
{
	int n, m;
	cin >> n >> m;

	for (int i = 0; i < n; i++)
	{
		if (i % 4 == 0 || i % 4 == 2)
		{
			for (int j = 0; j < m; j++)
			{
				cout << "#";
			}
			cout << endl;
		}
		else if (i % 4 == 1)
		{
			for (int j = 0; j < m - 1; j++)
			{
				cout << "*";
			}
			cout << "#" << endl;
		}
		else if (i % 4 == 3)
		{
			cout << "#";
			for (int j = 0; j < m - 1; j++)
			{
				cout << "*";
			}
			cout << endl;
		}
	}

	return 0;
}