#include<bits/stdc++.h>
using namespace std;

int main()
{
	int number;
	cin>>number;
	int number2;
	cin>>number2;
	int flag=0;
	for(int i=1;i<=number;i++)
	{
		if(i%2!=0)
		{	
			for(int j=1;j<=number2;j++)
			{
				cout<<"#";
			}
			
		}
		else
		{
			if(flag==0)
			{
				cout<<"#";
				for(int j=1;j<number2;j++)
				{
					cout<<"*";
				}
				flag=1;
			}
			else
			{
				for(int j=1;j<number2;j++)
				{
					cout<<"*";
				}
				cout<<"#";
				flag=0;
			}
		}
		if(i!=number)
		{
			cout<<"\n";	
		}
	}
	return 0;
}