import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int m =sc.nextInt();
        for (int i =0;i<n;i++){
            // for(int j=0;j<m;j++){
            if(i%4==0 || i%4==2){
                System.out.print("#".repeat(m));
                }
            else if (i%4==1){
                System.out.print("*".repeat(m-1)+"#");
            }
            else{
                System.out.print("#"+"*".repeat(m-1));
            }
                
                
            
            System.out.println();
        }
    }
}